As the world changes, plants and animals change with it. Aside from a few living fossils, the species we see today are very different from species that lived in the past.
What is the minimum age of a fossil?A living being that lived more than 11 thousand years ago is considered a fossil, that is, before the Holocene, which is the current geological epoch.
Ancient remains or evidence, but less than 11,000 years old, such as sambaquis, are classified as subfossils.
The dating of a fossil can be done based on the already known percentage of Carbon-14 (C14) in relation to Carbon-12 (C12) of living matter (without decomposition).
Thus, the fossil record can be used to show that organisms changed to meet new conditions.
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The diameter of a human blood cell is 0.0000062m. How can this number best be expressed in scientific notation?
Membuat 10 kalimat tanya
Pertanyaan bertujuan untuk menanyakan :
- Pentingnya air bagi manusia.
- Fungsi air bagi manusia.
- Cara melestarikan air.
Tolong bantu pliss
Answer:
Hindi ko maintindiyan yaan
Below is a food web from a tundra ecosystem in Nunavut, a territory in Northern Canada
Which two of the following organisms are secondary consumers in this food web?
parasitic jaeger
barren-ground caribou
bilberry
Arctic fox.
Answer:
2 and 4
Explanation:
Those eat things to become secondary
Ecosystems are made of food ___________ which are interconnected food ___________.
Answer: Ecosystems are made of food chains which are interconnected food webs.
Answer.
I believe the answer is Ecosystems are made of food chains which are interconnected food webs
Which of the following statements correctly describes the relationship between biodiversity and sustainability? (1 point)
O Biodiversity and sustainability both increase when the number of species in an ecosystem decreases.
O Biodiversity and sustainability both increase when the number of species in an ecosystem increases.
O Biodiversity increases while sustainability decreases with an increase in the number of species in an ecosystem.
O There is no relationship between biodiversity and sustainability.
The statement that correctly describes the relationship between biodiversity and sustainability is, biodiversity increases while sustainability decreases with an increase in the number of species in an ecosystem.
What do you mean by Biodiversity?Biodiversity may be defined as the sum total of all the living organisms living in a particular ecosystem.
As the number of species increases, biodiversity also increases because both are directly proportional to one another.
While the species enhancement negatively impacts the sustainability of the environment.
Therefore, the statement that correctly describes the relationship between biodiversity and sustainability is, biodiversity increases while sustainability decreases with an increase in the number of species in an ecosystem.
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When are the evolutionary effects of genetic drift the greatest?
The population size is small
The population size is large
$exual selection occurs
Intraspecific competition is weak
Answer:
The population size is small
Explanation:
If population size is small, the genetic diversity is low. Thus, genetic drift overtime results in individuals with very similar genotype. This is bad news because if a particular disease affects suppose organism with AA genotype and due to genetic drift all members are AA, then all the organisms might be decimated and extinct.
Answer:
population size is small
Explanation:
Read the statement.
A new allele added to the gene pool provides an advantage. The individual with the allele breeds and passes on the trait to their offspring.
This describes the evolutionary effects of what process?
genetic drift
genetic drift
mutation
mutation
random mating
random mating
gene flow
Which of the following is a strategy for controlling water pollution?
A: Using more salt on roads during snow and ice storms
B: Reducing natural wetlands by filling them in
C: Discharging hazardous chemicals directly into rivers
D: Identifying storm drains and placing signs on them to remind people not to dump chemicals in them
Answer:
D: Identifying storm drains and placing signs on them to remind people not to dump chemicals in them
Explanation:
Water pollution is the contamination of water either consciously or unconsciously.
From the options, the correct answer is Option D.
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[tex] \sf \red{Which \: of \: the \: following \: is \: a \: strategy \: for \: controlling \: water \: pollution?}[/tex]
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Since, mainly water pollution is caused by the waste chemicals that come out from factory. So, we should discharge factories that they shouldn't directly pass the chemical into rivers.
[tex]\pink\star[/tex]C: Discharging hazardous chemicals directly into rivers. So option (C) is correct.
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Which two statements best describe how jet streams affect climate?
A. They shift the direction of ocean currents, allowing them to affect weather on the continents
B. They influence the temperature of the ocean
C. They influence the pattern of storms
D. They shift north in the summer, allowing warm air masses to move further north
Answer:
A
Explanation:
Jet streams shift the direction of ocean currents, allowing them to affect weather on the continent and influence the pattern of storms.
What is jet stream?Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere.
These bands of strong wind can cause a change in the direction of the ocean currents, there by affecting the climatic condition of a particular geographical location.
Thus, Jet streams shift the direction of ocean currents, allowing them to affect weather on the continent and influence the pattern of storms.
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Where in a plant would you find a fruit?
Do peas and pea pods always appear the same on the same plant?
Answer:
Not really, because one pea pod might hold five peas, which another one on the same plant might be holding seven.
Think of a common pet or other familiar animal and identify three examples of structural adaptations it has. Explain why these adaptations are useful. Then identify a physiological adaptation in the animal and describe how it could help the animal survive or reproduce.
Structural adaptations are biological characters of an organism like the bill on a bird or the fur on a bear. Other adaptations are behaviour.
Define adaptation?Adaptation, the method by which a species becomes adapted to its surroundings; it is the outcome of biological selection's acting upon heritable divergence over various generations.
Thus,Structural adaptations are biological characters of an organism like the bill on a bird or the fur on a bear.
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Answer:
I have observed my pet cat and my findings are as follows:My cat’s ears are long, because this helps in heat radiation in our warm climate.Due to the warm climate, my cat sheds a lot of its fur to stay cool.My cat has sharp teeth and claws to catch and eat its prey. This may be because cats belong to the lion family, and they evolved to hunt their own prey.The fact that my cat has fast-growing nails that can be kept sharp is a physiological adaptation, which has helped cats scratch off predators and thus better their survival chances. In this case, the sharp nails are structural but the fast growth is physiological.
Explanation:
edmentum
50 points
Look at the food web shown below. which organisms get energy from producers?
a. squid
b. zooplankton
c. sperm whales
d. phytoplankton
Trophic webs involve energy transference through different organisms occupying different levels. These are producers, consumers (herbivores and carnivores), and decomposers. Option B. Zooplankton
What is a trophic web?The trophic web is the interaction between different organisms involving the transference of energy when some of them feed on the other ones.
The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
• The first link corresponds to a producer organism -autotroph-.
• The following links are the consumers -heterotrophs-: herbivores and carnivores.
• The last links are the decomposers that degrade organic matter from dead organisms.
Because it is a web, all organisms are in equilibrium until a change occurs. When a sudden change affects any of the involved links, there can be a cascade effect on the web.
Any change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
In this trophic web, we can see that the producer is phytoplancton (first link).
Phytoplancton is eaten by zooplankton and shrimp (second link). They are primary consumers that feed on phytoplancton.
The correct answer is b. zooplankton.
a. squid ⇒ They get energy from shrimp
b. zooplankton ⇒ They get energy from phytoplankton
c. sperm whales ⇒ they get energy from squids
d. phytoplankton ⇒ they get energy from sunlingh.
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explain different types of biotic interaction
Answer:
predation, commensalism, mutualism, resource competition, and parasitism
What two types of movements do all planets have? What natural phenomena do they cause?
PLS I NEED IT FOR NOW
Answer: Rotation and revolution. Natural phenomena is day/night, seasons changing, tides changing, wind direction, ocean currents, precipitation.
Explanation:
Rotation is when an object spins on its own access, Revolution is when an object orbits or travels in an elliptical around another object. Like the earth revolves around the sun once every 365 days. The earth also rotates once every 24 hours.
For the natural phenomena, when the earth is moving as it does, there is a constant change in everything on the earth. Because of rotation, day and night happens. Because of revolution, seasons change. All of this makes different currents and weather.
Answer:
First question: orbit and spin
Orbit is around the sun, which causes the years to form
Spin is the planet itself, which causes the days to form.
Explanation:
Explain how you can use highlighting pens to increase your understanding of a text. Write your
answer in complete sentences.
The use of highlighting pens can increase your understanding of a text by: Helping you stay focused, as well as helping you to keep track of the most important part of a text.
Meaning and use of a Highlighting penA highlighting pen as the name implies is a pen with a unique feature used for marking a particular word, group of words and sentences to stand out in a page.
The highlighting pen is used for so many things in schools, churches, and organization these include: Marking a page, noting a key word, marking a word is yet to be understood etc.
In conclusion, The use of highlighting pens can increase your understanding of a text by: Helping you stay focused, as well as helping you to keep track of the most important part of a text.
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What is the principle of base pairing
Explanation:
in dna cytosine pairs with guanine and adenine pairs with thymine add on rna adenine pairs with uracil
D
Question 1
What does an allele represent?
Each pair of alleles represents the genotype of a specific gene.
Alleles are defined as the pairs of genes, occupying a particular spot on a chromosome.
Read the excerpt from Blanca Flor. Juanito. Really. Where? [THE DUENDE points to a path in the forest. JUANITO stands up and looks down the path.] Juanito. There's nothing down that path. I've been down that path and there is nothing there. The Duende. Look again. Look again. Be careful. Be careful. (He begins to walk off, carrying the bag of tortillas with him.) Why does the author provide foreshadowing in this excerpt? to indicate that the Duende is evil to indicate that the Duende eats too much to indicate that Juanito will be in danger to indicate that Juanito needs more tortillas
Stage directions are the instructions that a story or a play has in between the dialogues ad even the beginning of the play.
What is Stage directions?Stage directions are the instructions that a story or a play has in between the dialogues ad even the beginning of the play. They indicate how the actions are done, where or what is happening and the movement, the position, or even the tone of whatever is happening in the scene.
The given detail from Blanca Flor is an example of stage direction. It indicates the unspoken action that is happening in the scene, which cannot be mentioned as part of a dialogue. It also reveals the actions of both the Duende and Juanito which cannot be spoken of in words but only seen in actions.
Thus, Stage directions is the answer.
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what type of muscle tissue is found only in the heart?
Answer:
The cardiac muscle is only found in the heart.
Since 2000, pet owners in Florida have been releasing their pet pythons into the wild once they become too large to keep in their homes. The pythons do not have any natural predators and feed on native wildlife such as rabbits and racoons. They consume resources that would normally be available to plants and animals in the Florida ecosystem. What would the pythons be considered?
Why do the colors in the light spectrum bend at different angles when they pass through a prism?
The colors in the light spectrum have the same wavelength.
The colors in the light spectrum have different wavelengths.
The colors in the light spectrum have different refractive indices.
The colors in the light spectrum have the same refractive indices.
Answer:
Since the differences in the refraction index between the air and the glass, light bends once it enters the prism. Since the sides are angled the light bends even more when it leaves the prism.
Explanation:
Which of these is the strongest evidence that all organisms on Earth evolved from a common ancestor?
A. All organisms inherit instructions for their development in DNA.
B. Many species have body parts with homologous structures.
C. Major groups of organisms share a specific type of embryo.
D. The fossil record shows an example of every organism that ever lived.
can anybody help pic below
Answer:
Your answer is Option C
Explanation:
Stay safe, stay healthy and blessed
Have a good day !
Thank you
Briefly explain how cell differentiation and cell death are both needed to develop such structures as human hands and feet.
Answer:
Apoptosis also plays a key role in human development. For instance, as we saw in the introduction, your hand started out as a paddle-like block of tissue when you were an embryo. The block was “carved” into fingers by apoptosis of the cells in between the developing fingers.
Explanation:
A balanced diet for sendintary worker
PLEASE HELP ME FAST. How would a reduction of carbon dioxide emissions affect the oceans? Select the two correct answers.
It would reduce ocean temperatures.
It would increase ocean temperatures.
It would lower the pH of the oceans.
It would raise the pH of the oceans.
Answer:
It would lower the pH of the oceans.
Explanation:
When carbon dioxide dissolves in seawater, the water becomes more acidic and the ocean's pH (a measure of how acidic or basic the ocean is) drops. Even though the ocean is immense, enough carbon dioxide can have a major impact.
CO2 emissions are also making the ocean more acidic, making many marine species and ecosystems increasingly vulnerable. Ocean acidification reduces the ability of marine organisms, such as corals, plankton and shellfish, to build their shells and skeletal structures.
Students are the only ones that need to follow the lab safety rules. Students are the only ones that need to follow the lab safety rules. True False
FALSE
WHY?
BECAUSE IS NOT THE ONLY STUDENTS NEED TO FOLLOW THE LAB SAFETY RULES.
Trees maintain the balance between gases in the air, removing carbon dioxide from the air and releasing oxygen.
Please select the best answer from the choices provided
T
F
False, due to pollution and greenhouse gasses, although trees do absorb Co2, the air is still not ballenced. Trees help, but not enough.
Answer:
True statement
Explanation:
In Meiosis, what phase does crossing over, independent assortment, and non disjunctions occur? What are the two types of gametes produced in meiosis? How is genetic variation created in meiosis? What are the possible conditions that could arise is as a result of nondisjunction? What are the phases of meiosis?