Gymnosperms and angiosperms evolved seeds and pollen grains allowing them to live and reproduce in drier habitats than bryophytes and seedless vascular plants.
Gymnosperms are plants which bear seeds without fruits or without any outer coverings. These plants also do not produce flowers. Most plants under this group have needle-shaped leaves. This is an adaptation as these plants grow in colder conditions. Gymnosperms. These plants produce pollen without bearing flowers. Angiosperms are found in almost all climatic conditions. These plants bear flowers and produce seeds that are enclosed inside a fruit or inside an ovary. The seeds of angiosperms have a single cotyledon.
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Fertility in humans is a trait that is controlled by multiple genes, and which has environmental influences, such as the health and nutrition of the potential parents. What terms describe fertility as a trait
Polygenic traits describe fertility as a trait.
A polygenic trait is a function, together with top or skin coloration, this is encouraged by means of two or extra genes.
Because a couple of genes are concerned, polygenic developments do now not comply with the patterns of Mendelian inheritance. Many polygenic trends also are prompted by the surroundings and are referred to as multifactorial.
An instance of polygenic inheritance is white recognition in mice and green color in wheat. Mendelian inheritance revolves across the regulation of dominance, the law of independent assortment, and the regulation of segregation of gametes and offers a clear ratio and does no longer communicate approximately the integration of two characters. Right here, one gene controls one trait.
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When examining the transmission of phenylketonuria (PKU), a recessive trait, we can clearly identify the __________ when a child is afflicted with PKU. For the child not afflicted with PKU, we can only identify the __________, as the child may or may not be a carrier. Group of answer choices
When examining the transmission of phenylketonuria (PKU), a recessive trait, we can clearly identify the genotype when a child is afflicted with PKU. For the child not afflicted with PKU, we can only identify the phenotype, as the child may or may not be a carrier.
An organism's genotype is its particular aggregate of alleles for a given gene. So, for example, in the pea plants above, the feasible genotypes for the flower-color gene were pink-purple, red-white, and white-white. The phenotype is the bodily manifestation of an organism's allellic combination (genotype).
Someone's genotype is their precise sequence of DNA. Greater specifically, this term is used to consult the two alleles someone has inherited for a selected gene. Phenotype is the detectable expression of this genotype – a patient's scientific presentation.
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Use the soil triangle to determine which of the following soil types is 30% clay, 10% silt, 60%
sand.
A soil with 60 percent sand, 30 percent silt, and 10 percent clay would be classified as a sandy loam.
What is soil triangle?The soil texture triangle is a triangle in which the bottom side illustrates percent sand, while the right and left sides indicates percent silt and clay. The soil textural triangle is used to determine soil type based on percentages of sand, silt and clay.
So we can conclude that A soil with 60 percent sand, 30 percent silt, and 10 percent clay would be classified as a sandy loam.
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A large population of yellow perch lives in the east river. the walleye is a larger fish that eats the yellow perch. despite lots of prey all the walleye have moved from the east river to a new river. what most likely caused the walleye to move to a different river?
The lack of adaptations to the habitat most likely caused the walleye to move to a different river.
Adaptation
It is a biological mechanism that increases the chance of its survival in a new environment or the changes in the existing environment. Adaptation occurs as a result of evolution and allows the organism to survive and reproduce efficiently in its environment.
Physical adaptations include accumulating changes in the physical characteristics of an organism that help them to survive and reproduce better. Example: evolution of long necks in giraffes.
Behavioral adaptations are changes in the behavior or habits of organisms that help them to sustain in a changing or new environment. Example: Hibernation.
Due to some reason, the walleye were not able to adapt to the environment of the east river which is why they must have moved to a new river despite the presence of a lot of prey.
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Which phase of cell division is shown?
Exploring mitosis.
telophase I
prophase I of meiosis
anaphase II
telophase II
The image shows the phase of cell division called telophase II.
What is Telophase II?It is the last phase of mitosis, the sister chromatids separate, the chromosomes decondense, the achromatic spindle breaks down and the karyotheca, and consequently the nucleoli, reappear. With cytokinesis, in telophase I two daughter cells are formed and continue in the process of division until telophase II.
In this case, we can see in the image that the chromosomes decondense so we have telophase II.
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Come up with a description for the chaparral biome.
Answer:
A temperate biome, chaparral, or Mediterranean Forests and Shrub is known for its hot, dry summers and moderate, wet winters. The winter and spring rainy seasons see almost all of the rainfall. The locations are
Mediterranean regionsCalifornia in North AmericaSouthern AustraliaSouthern AfricaThe chaparral is a distinctive group of plants that has adapted to poor, dry, well-drained soils, exposure to the sun, and maritime conditions. It predominates the south-facing slopes of California's numerous mountains, as can be seen on the cross-sectional map of the US shown above from the Pacific to the Atlantic Oceans. Some of the species are found up in Oregon, in the north.
Because the species are fire resistant in addition to withstanding mild drought, burning is a factor in the growth and health of this plant community.
Depending on the soil substrate, drainage, and plant species composition, the community is separated into hard and soft chaparral species. Additionally, there are seven different types of chaparral based on the predominant plant species.
As a result, these strange plant species are coupled with a vegetational relationship of fungi, mammals, and bacteria.
One authority notes that
“The Chaparral Biome of California. In further looking at the US chaparral biome in California, also known as the woodlands and grasslands of California,you'll find the biome in a section of the Sierra Nevada. The coastal range lays at 53° to 65º latitude on the coast and 32° to 60º North in the mountain range.”There is a large park which is owned by the local city government with a food forest containing many fruit and nut trees. What will most likely happen to that food forest
Answer:
It is likely that the food forest will be maintained by the local city government.
Explanation:
Which structure controls the movement of tube feet?
Mutagens a. are the sole cause of mutations in DNA. b. come in two basic forms: ionizing and nonionizing radiation. c. decrease the likelihood of mutations in DNA. d. increase the likelihood of mutations in DNA.
Mutagens increase the likelihood of mutations in DNA.
A mutagen is a chemical or bodily agent able to induce adjustments in DNA referred to as mutations.
Mutations end result both from mistakes in DNA replication or from the dangerous outcomes of mutagens, along with chemical compounds and radiation, which react with DNA and trade the systems of person nucleotides. All cells possess DNA-restore enzymes that try and limit the range of mutations that arise
Examples of mutagens encompass tobacco merchandise, radioactive substances, x-rays, ultraviolet radiation, and an extensive sort of chemicals.
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Explain why the absence of bacteria in the food does not necessarily mean the food is safe to eat.
Even if the bacteria is absent from the food, several fungi, mycotoxins, protozoa me be present in the food.
Foods are rarely sterile and often contain natural chemical substances. They contain a diverse population of microbes that come from many sources of the natural micro flora. From the time of harvest to the time of preparation and consumption, microbes contaminate the food. A food's microflora is primarily influenced by the type of microbe, the features of the food, contamination, and the conditions during preparation and storage. Foods may contain bacteria, fungus, protozoa, algae, viruses, and other microbial species.The absence of bacteria does not guarantee that the food is safe to consume because there may still be enterotoxins, mycotoxins, fungi, and other difficult-to-identify microorganisms present.learn more about food microflora here: https://brainly.com/question/15936720
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Reptiles are better suited to dry land than their amphibian ancestors because
Group of answer choices
their watertight skin minimizes moisture loss.
amphibians must lay eggs in water or in moist soil to reduce moisture loss.
reptile egg shells are harder than amphibians' eggs.
all of the choices
Answer:
All of the above.
Explanation:
1. Their watertight skin minimizes moistures loss: Reptiles have a reputation that they are “slimy” when we touch and hold them; however, they have dry skin, which has even fewer glands than mammals or amphibians. The main special feature of their skin is that the epidermis is heavily keratinized with a layer, which also prevents water loss.
2. Amphibians must lay eggs in water or in moist soil to reduce moisture loss: Because amphibian eggs don't have an amnion, the eggs would dry out if they were laid on the land, so amphibians lay their eggs in water.
3. Reptile egg shells are harder than amphibians' eggs: Reptile eggs are coated with a leathery or brittle coating, and the animals that hatch from them are miniature versions of the full-sized animal parent. In contrast, amphibian eggs are transparent and jelly-like. The animals that hatch from them still must go through metamorphosis.
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help me solve this problem please i'm trying pass the 7th grade please
Which body region should be avoided during myofascial release techniques? Lumbar spine Thoracic spine Knee Pelvis
Pelvis should be avoided during myofascial release techniques.
What is myofascial and it's massage?
The method focuses on pain that is thought to originate in your muscles' tough membranes known as myofascial tissues, which wrap, link, and support your muscles. Myofascial pain, which is related to "trigger points," which are associated with stiff, anchored places inside the myofascial tissue, theoretically varies from other types of pain.
A stimulation, such as muscle stiffness, that activates trigger points in your muscles is what causes myofascial pain syndrome. The following elements may raise your risk of developing muscle trigger points: muscle harm. Trigger points can form as a result of a recent muscular injury or ongoing muscle stress.
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Which statement about biomes is true?
Answer:
Biomes are defined by their climate and life forms.
Explanation:
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Identify the difference between the distance she walked and her displacement
The change in position from beginning to end and the direction taken is referred to as displacement.
What is Distance?This used to measure how far or close objects are in relation to one another.
Displacement on the other hand has the direction being taken into consideration which is the major difference.
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Many farmers are worried about the decreasing genetic diversity of plants associated with generations of artificial selection and inbreeding. Why is limiting random sexual reproduction of food crops concerning
Your question is incomplete. Please read below to find the missing content.
Larger portions of the plant populations are susceptible to the same diseases.
The answer is option A
The hassle of small farmer livelihood is aggravated due to the truth that small farmers be afflicted by many manufacturing dangers like drought, flood, loss of ok use of inputs, poor extension leading to huge yield gaps, loss of confidence and adequate irrigation, crop failure and so forth.
The farmer's concerns are:
cope with weather exchange, soil erosion, and biodiversity loss.satisfy customers' converting tastes and expectancies.Meet the growing call for more meals of higher high-quality.spend money on farm productivity.undertake and learn new technology.live resilient in opposition to worldwide financial elements.Many farmers are worried about the decreasing genetic diversity of plants associated with generations of artificial selection and inbreeding. Why is limiting random sexual reproduction of food crops concerning?
a. Larger portions of the plant populations are susceptible to the same diseases.
b. Mutations during asexual reproduction decrease plant fitness.
c. Spores are not viable in an agricultural setting.
d. Consumers do not trust identical-appearing produce.
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Define the following terms as used in ecosystem:. Community.. Population. Food chain. Food web.
Answer:
Hello !
Ecosystem An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. It's also a system formed by an ecological community and its environment that functions as a unit.
population is the people living within apolitical or geographical boundary. in biology a community of animals, plants, or humans among whose members interbreeding occurs.
a community of animals, plants, or humans among whose members interbreeding occurs."fluctuations in populations of voles and lemmings"
Food chain the feeding relationships between species in a biotic community. also the series of processes by which food is grown or produced, sold, and eventually consumed.
Food web a diagram showing the organisms that eat other organisms in particular ecosystem, predators being higher in the web than their prey.
Didinium are carnivorous protistans that prey on other, slower moving protistans. How should Didinium be classified
Didinium is classified as eukaryotic consumer.
Heterotrophic organisms include Didinium. They only consume the considerably larger ciliate Paramecium as prey. A Didinium releases attachment lines and poison darts (trichocysts) when it discovers a Paramecium. The Didinium then starts to swallow its prey whole.The only organism with a genuine nucleus and other organelles that are attached to membranes is a protist. Consequently, they are categorized as eukaryotes.The Didinium is a type of protist with unicellular ciliates. It lives in water and feeds primarily on paramecium, however it also occasionally consumes other ciliates. As a result, Didinium is a member of the eukaryotic consumer kingdom.
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Explain why mitosis is important to both unicellular and multicellular organisms.
Answer:
In multicellular organisms, mitosis produces cells for growth and repair where in unicellular organisms, it produces identical cells. :)
In unicellular organisms such as bacteria, mitosis helps in asexual reproduction as it produces an identical copy of the parent cell. :D
In multicellular organisms, body cells undergo mitosis to provide new cells for growth or to replace cells that have been damaged and died. :)
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A cell in early interphase has 10 chromosomes. How many chromatids will the same cell have during prophase?.
Answer:
20
Explanation:
While doing field research, two scientists discover a new species of plant. They take the plant back to their lab to watch how it grows and reproduces. Soon, the plant begins to produce a small purple flower. Upon further investigation, the scientists discover that the plant's seeds contain two embryonic leaves.
Which group could the plant belong to? Check all that apply.
As the new species of plant produced purple flowers, so, the plant belongs to the angiosperms group. Also, the seeds of the plant contain two embryonic leaves, so, the plant must be a dicot.
Out of all five divisions of plants, only the plants that come under the Division Angiosperm can bear or form flowers. That's why angiosperms are also called flowering plants. Angiosperms are further divided into two groups based on the number of embryos that are produced from seeds on germination. If the germinating seeds contain only one embryo leaf, then we call them monocots while the seeds that contain two embryo leaves during their developing seeds, then they are called dicots.Thus, the plant that is discovered by scientists comes under the angiosperm group and further into the dicot group. Dicots have two embryo leaves on germination of their seeds and they also form flowers.
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Which is not a specific to predators that live in groups?
In the heart of Costa Rica, there's a private reserve called Rara Avis. Here, one can hike high into the mountains of a tropical cloud forest to take guided nature hikes and learn about this unique ecosystem. This is an example of:
In the heart of Costa Rica, there's a private reserve called Rara Avis. Here, one can hike high into the mountains of a tropical cloud forest to take guided nature hikes and learn about this unique ecosystem. This is an example of ecotourism.
Ecotourism is a shape of tourism related to accountable journeys (using sustainable shipping) to natural areas, retaining the environment, and improving the well-being of the local community.
Its motive can be to teach the traveler, offer finances for ecological conservation, without delay benefits the monetary improvement and political empowerment of neighborhood communities, or foster recognition for different cultures and for human rights.
For this reason the Eighties, ecotourism has been considered an important undertaking by environmentalists, so that future generation may revel in destinations noticeably untouched by means of human intervention.
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for (50) points i need help please answer
Explanation:
The type of rocks in which dinosaur fossils (and almost all other fossils) are found is called sedimentary rock. Sedimentary rock generally occurs as flat layers called strata (single layers called stratum). Imagine you have a handful of both coarse and very fine sand and a bucket of water. If you were to drop the sand into the water two things would happen. First, the sand would settle to the bottom of the bucket. The coarse sand would settle faster and then the fine sand would slowly settle out. Secondly, when the sand reached the bottom of the bucket it would spread out forming two flat layers, a layer of coarse sand covered by the layer of fine sand. The process of settling is called sedimentation from the Latin, sedimentum, meaning the act of settling. The layers formed across the bottom of the bucket are called strata, from the Latin word stratum, meaning covering.
Virtually the identical process occurs in nature. Imagine a river carrying lots of sand and other material worn from rocks emptying into a large body of water like a lake or ocean. Flat layers are created on the bottom of the body of water. Dinosaur bones carried by the river would also settle out and be found in one of the layers on the lake or ocean bottom. Eventually it would be covered by subsequent layers. Over time, the soft layers would be turned into rock, the bones would be preserved within the layers, and finally they might be raised to the surface where a lucky paleontologist might recover them for a museum.
Looking for bone layers is much like playing detective. Using 4.6 billion years as the age of the Earth and 164 million years for the tenure of dinosaurs on the planet, it is easy to determine that dinosaurs existed on Earth for only a very short part of the Earth's history (only 3.6% of the time). Holmes (see References below) lists a maximum total thickness of 452,000 feet of rocks that are known to contain fossils of animals with hard parts; only 125, 000 feet of which were deposited when the dinosaurs existed. If only 28% of the fossil-bearing rock thickness may contain dinosaur fossils, how do we search for them?
The first thing we must do is narrow the search. We must first locate the 28% of sedimentary rocks in which dinosaur fossils may be found. Let's consider an ideal situation. A paleontologist from Texas went on vacation to Montana where he discovered dinosaur bones in a particular layer of rock. He wondered if the same layer existed in Texas so he could find bones closer to his home. If that particular rock layer appeared on the Earth's surface, continuously, all the way from Montana to Texas he would be able to walk along the layer to follow it. That would be easy, but, unfortunately, the easy way never seems to work. In many cases the bonelayer would be covered by layers of younger rocks, and in other cases the bone layer could be worn away by erosion. Both covering and erosion would make it impossible to follow the layer from Montana to Texas. Clearly, another method must be found. One of the most reliable ways to locate fossils is with other fossils. Certain widely found fossils represent animals that only lived on Earth for a very short time. Such fossils are called index fossils. When found in two geographically separated layers, they allow scientists to say, with some confidence, the layers are the same. Index fossils can be used to track a layer from Montana to Texas, or from Montana to France. The process of determining if layers in different places are the same is called correlation.
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Once the layer is found, more work needs to be done. Dinosaurs probably did not live everywhere in that layer. We know that dinosaurs did not live in the oceans. We can avoid searching in areas that fossils tell us were oceans at the time of the dinosaurs. Fish and marine reptiles (such as plesiosaurs) did not live in the same places as dinosaurs. If paleontologis ts find the former, they won't find the latter. Index fossils allow us to not only determine what layers contain other fossils, but also where in that layer certain fossils may be found
What happens to the daughter cells produced during mitosis?
________itis is an inflammatory disease of the nervous system involving the roots of the spinal nerves.
Transverse myelitis is an inflammatory disease of the nervous system involving the roots of the spinal nerves.
Overview - Transverse myelitis
It is a neurological disorder that damages the myelin sheaths of neurons in the spinal cord. This results in the interruption of the transmission of signals through the neuron. This results in extreme pain, weakness of muscle, sensory impairment, bowel and bladder dysfunction, paralysis, etc.
Symptoms
Symptoms can be exhibited on both sides of the body below the affected region of the spinal cord or on one side. Typical symptoms include,
Pain
Abnormal sensation
Weakness of arm and leg muscles
Bladder and bowel dysfunction
Causes
Infections can trigger transverse myelitis. Viruses (Herpes, Epstein-Barr, HIV, West Nile Zika, Hepatitis-B, etc), bacterial diseases (syphilis, tuberculosis, tetanus, etc), inflammations (such as multiple sclerosis, autoimmune disorders, etc) can cause transverse myelitis.
When to visit the doctor
See the doctor as soon as possible as the condition can worsen over time. Proper diagnosis is key as some other neurological disorders can also exhibit similar symptoms.
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how the fruits and vegetables made available in the off seasons?
Answer:
some need artificial protection and production just to work different and put some own effect on vegetation from nature.
Ovulation is triggered by peak concentrations of which peptide secreted into the blood A. estrogen B. LH C. ACTH D. FSH E. progesterone
Ovulation is triggered by peak concentrations of luteinising hormone peptide secreted into the blood, which is option B.
What is ovulation?Ovulation is the release of an ovum from an ovary.
Luteinising hormone is produced by anterior part of the pituitary gland and stimulates ovulation and the development of the corpus luteum in female mammals.
The luteinizing hormone is released in by the pituitary gland of the brain, which triggers the ovulation.
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In an active muscle cell, aerobic cellular respiration generates about ________ ATP from one glucose.
In an active muscle cell, aerobic cellular respiration generates about less than 50 ATP from one glucose.
What is aerobic cellular respiration ?During aerobic cellular respiration, glucose and oxygen combine to create ATP, which the cell can utilise. As byproducts, carbon dioxide and water are produced. The general equation for aerobic cellular respiration is: ATP is produced when glucose and oxygen combine in cellular respiration. The 5 stages that have to take place are glycolysis, oxidation of pyruvate, Krebs's cycle, electron transport chain, and chemiosmosis.
In the presence of oxygen, organisms can employ aerobic cellular respiration to generate up to 38 ATP molecules from a single glucose molecule. Without oxygen, organisms must manufacture ATP by anaerobic respiration, which yields just two ATP molecules for every glucose molecule.
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Primary varicoceles are associated with all of the following, except: * 5 points Palpable extratesticular mass Infertility Left sided location Retroperitoneal mass
Primary varicoceles are associated with all of the following, except retroperitoneal mass.
Veins in your scrotum that expand cause a varicocele (the pouch of skin that holds your testicles Palpable intratesticular mass). The pampiniform plexus is the name given to these veins. Ten to fifteen males out of one hundred have varicocele and causes infertility. It is comparable to developing varicose veins in your leg.Varicoceles occur when the scrotal pampiniform plexus veins expand. Similar to varicose veins are these veins (twisted, swollen veins, found in the leg.) Varicoceles develop during adolescence. Over time, you might start to notice them more and they might get bigger. On the left side of the scrotum, varicoceles seem to be more common.learn more about Primary varicoceles here: https://brainly.com/question/15292735
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