One of the earliest adaptations made by hominids was bipedalism, and there are several theories as to how the human ancestors acquired it. One of them claims that after a group of our ancestors started living in Savannah habitats, bipedalism emerged (open areas covered with grasses). The Savannah lineages didn't have many trees to climb, so the upright posture let them see predators in the distance. Other lineages remained in the forests, where they could use the treetops and branches for protection and to collect food.
The second theory links the use of tools to the evolution of human bipedalism. The two forelimbs are free to explore the environment, aid in the use of tools, and even gather food while moving because a species does not move on all four limbs.
With this knowledge, we can conclude that bipedalism gave the human race a free arm to build technology and allowed them to move more slowly while walking, among other benefits.
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What do we call a complex sugar?A. starchB. lipidC. protein
Biomolecules are divided into 4 groups, each group has different structures and therefore harbors different compounds:
1. lipids: fatty acids, cholesterol, etc.
2. proteins: aminoacids, peptides.
3. nucleic acids: DNA, RNA
4. carbohydrates: Sugars (glucose), Complex sugars (cellulose and starch)
Complex sugar is a carbohydrate composed of many glucose molecules intertwined with each other, one example is starch.
When some bacteria use lactose as a source of energy, they produce propionic acid and carbon dioxide. What is the name for this process?.
When some bacteria use lactose as a source of energy, they produce propionic acid and carbon dioxide. The name of this process is fermentation.
What is fermentation?
Fermentation is an anaerobic chemical process that breaks down molecules like glucose. More specifically, fermentation is the foaming that happens during the creation of wine and beer, a procedure that has been around for at least 10,000 years.
The word "fermentation" currently refers to the enzyme-catalyzed, energy-producing route in cells that involves the breakdown of substances like glucose under anaerobic conditions. Thus, the processes that result in the synthesis of ATP and pyruvate during the transformation of sugar in muscle, yeast, certain bacteria, and plants are similar.
Therefore fermentation is what happens when bacteria use lactose as a source of energy and produce propionic acid and carbon dioxide.
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How has the sun caused changes in global and hemispheric temperatures over the past millennium?.
Changing solar output is most likely responsible for relatively high Northern Hemisphere temperatures during 1000-1100 A.D. and relatively low Northern Hemisphere temperatures during 1600-1700 A.D.
Recreations of the most recent 1,000 years have been finished with a few distinct models. A portion of the subtleties are unique, they all show a few comparable patterns in Northern Hemisphere atmosphere; relative warmth before the fourteenth century followed by chilly periods between the fifteenth and mid nineteenth hundreds of years. The warming of the twentieth century is, given the viewpoint of the earlier thousand years, extraordinary.
These reenactments intently coordinate the paleoclimate record of temperature throughout the previous 1,000 years. Contrasts between the time arrangement are because of a few variables, remembering vulnerabilities for the driving time arrangement, for instance whether solid or frail sun oriented constraining is utilized, and the flightiness of certain collaborations between the air, sea, land surface, and ocean ice.
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a group of scientists wants to test the effects of decreased oxygen levels in the water on a population of albacore. what result from this experiment would show natural selection in progress?
Fish that can survive the lower oxygen levels undergo natural selection. These fish will reproduce and proliferate.
The water's lower oxygen levels will impact fish respiration. The fish may relocate to a better area with more dissolved oxygen in order to adapt to the change. However, because the fish are still the same genetically and phenotypically, there is no connection to the process of natural selection. Fish that can survive the reduced oxygen levels are selected naturally. These fish will reproduce and multiply in quantity. Fish from the next generation will be tolerant of decreased oxygen levels. This novel phenotypic denotes a modification in the genetic makeup of the fishes.
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the adam's apple is: a the small indentation in between the thyroid and cricoid cartilages. b the upper part of the larynx that is formed by the thyroid cartilage. c below the thyroid cartilage and forms the upper part of the trachea. d the lower part of the larynx that is formed by the cricoid cartilage.
The Adam's apple is found in the upper part of the larynx that is formed by the thyroid cartilage.
Hence, option B is correct.
Where is Adam's apple?The cartilage that wraps around the front of our larynx, or voice box, is referred to as the Adam's apple or the laryngeal prominence. The name "Adam's" apple may have originated from the biblical account of Adam and Eve, in which Adam consumed an apple, the forbidden fruit, which lodged in his throat. Our voice box and vocal cords are shielded from damage by the Adam's apple, despite the fact that it has little to do with apples.
What is the purpose of Adam's apple?The Adam's Apple's main purpose is to safeguard the vocal chords directly behind it in both sexes, independent of the angle at which it is viewed. This function is shared by the thyroid cartilage that makes up the Adam's Apple.
Thus from above conclusion we can say that the Adam's apple is found in the upper part of the larynx that is formed by the thyroid cartilage.
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It would be either because people two blue eyes can have a green eyed kid
Answer:
First, the answer is yes to both questions: two blue-eyed parents can produce green or brown-eyed children. Eye color is not the simple decision between the brown (or green) and blue versions of a single gene. There are many genes involved and eye color ranges from brown to hazel to green to blue
Explanation:
Scientists have produced a hybrid plant that was the result of the fertilization of gametes between one plant with a diploid number of 24 and another with a diploid number of 20. How many chromosomes would the diploid hybrid plant have?.
The number of diploid chromosome in hybrid plant will be 22 .
Haploid refers to the presence of a single set of chromosomes in an organism's cells. Sexually reproducing organisms are diploid having two sets of chromosomes, one from each parent. In humans, only the egg and sperm cells are haploid.
Diploid describes a cell that contain two copies of each chromosome. Nearly all the cells in the human body carry two homologous, or similar, copies of each chromosome. The term diploid refers to two sets of chromosomes resulting from the union of the sperm and the egg. This is typically the number of chromosomes found in the nuclei of body cells of a plant or animal. In plants, the diploid part of the life cycle is called the sporophyte.
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anybody willing to help me on the whole thing will get it extra points and i’ll give brainliest to, i need help please this is due soon
Answer:
1. for it to move to the right 50N, 75N needs to be added
2. 50N
Day 4:
1. B
2. U
3. B
4. B
5. B
6. U
7. B
8. U
9. B
10. U
Explanation:
1. 75+25= 100 - 50 = 50
2. 125- 75 = 50 so to balance it out , add 50 to the other side
HELP PLEASE. Which type of skeletons do mammals such as mice have?
O articulated
O exoskeleton
O endoskeleton
O arthropoidal
Answer:
C
Explanation:
I took the test
Select the correct answer.
A stream of water holds thriving bacteria. If drought conditions caused the stream to dry up, how would the bacteria mostly likely respond to survive?
A.
They would learn how to photosynthesize.
B.
They would produce more peptidoglycan.
C.
They would secrete more polysaccharides.
D.
They would produce endospores.
A stream of water holds thriving bacteria. If drought conditions caused the stream to dry up, they would produce endospores. The correct answer is option D
Why do bacteria produce endospores?
Endospores are external structures produced by bacteria when harsh conditions are present. This survival skill ensures the bacteria survives a harsh condition such as high temperatures.
The bacteria forming an endospore would be able to survive unfavorable environmental conditions such as when the stream dried up.
In summary, when the stream dried up, it exposes the organisms that lives in the stream to heat, and lack of water. Under this condition, most organisms would die, but the endospores produced by the bacteria living in the stream would ensure it survives that condition until water returns to the stream.
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31) prairie dogs once covered the expanses of the great plains. their grazing made the grass more nutritious for the huge herds of bison, and a variety of snakes, raptors, and mammals preyed on the rodents. in fact, the black-footed ferret (now endangered) specialized in prairie dog predation. today, growing housing and agricultural developments have covered many prairie dog towns. which of the following statements about prairie dogs is true? a) their realized niche has expanded. b) they have a mutualistic relationship with bison. c) they are probably a poor candidate for keystone species. d) their fundamental niche is changed. e) their fundamental niche has expanded.
E) Their core target market has grown
Prairie dogs play a significant role in the ecosystems they live in. They have an impact on grasslands both directly and indirectly due to their grazing, burrowing, and role as prey.
How do prairie dogs change with the surroundings?Some of their physical modifications have given them the ability to thrive at what they do. Burrow-digging is made easier for them by their long-nailed toes and short, powerful arms. Despite having tiny legs, prairie dogs can travel short distances at speeds of up to 35 mph in order to flee from predators and reach the safety of their burrows.
The prairie dog is a keystone species because it is essential to the health of the entire ecosystem in which it lives. The reason for this is that prairie dogs are able to make the soil more fertile, improving the conditions for plant growth and benefiting herbivores. They also reproduce quickly and serve as prey for a variety of predators, thus they are in high demand.
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A ______ expresses a gene or genes that direct production of the signaling molecule, and the ______ expresses a gene or genes that direct production of the ______.
A __signaling cell____ expresses a gene or genes that direct production of the signaling molecule, and the _responding cell_ expresses a gene or genes that direct production of the _receptor protein_.
1. Without what a car's tires would have nothing to grip.
A. friction
B. acceleration
C. velocity
D. speed
Answer:
Friction
Explanation:
Friction helps your tires grip the road so you can steer and can control your vehicle.
The ________ lobes are responsible for voluntary movement, thinking, personality, and purposeful actions.
Answer:
Frontal
Explanation:
The ____frontal____ lobes are responsible for voluntary movement, thinking, personality, and purposeful actions.
Compare and contrast plant and animal cells. Give 3 ways they are alike and 3 ways they are different.
Answer:
1. They both have a cell membrane
2. They both contain cytoplasm
3. They both have mitochondria
1. Plant cells have a cell wall where as animal cells don't have a cell wall.
2. Plant cells have larger, less number of vacuoles and animal cells have smaller, plenty vacuoles.
3. Plant cells have chloroplasts while animal cells don't contain them.
Answer:
Plant and animal cells are similar in many ways, but they also have some key differences. Here are three ways they are alike and three ways they are different:
Ways plant and animal cells are alike:
Both plant and animal cells have a cell membrane that surrounds the cell and regulates what goes in and out.
Both types of cells have a nucleus that contains the cell's genetic material.
Both types of cells have mitochondria, which are responsible for producing energy.
Ways plant and animal cells are different:
Plant cells have a cell wall made of cellulose, which provides structure and support, while animal cells do not.
Plant cells have chloroplasts, which are responsible for photosynthesis and contain chlorophyll, while animal cells do not.
Plant cells often have one large central vacuole, which stores water and helps maintain turgor pressure, while animal cells have smaller vacuoles, if any, which are used for storage and transport.
What makes water molecules polar?
A.The atoms of a water molecule have linear bonds and equal electronegativities
B. The ability to covalently bond to other water molecules and distribute equal sharing of electrons
C. The hydrogen atoms are slightly positive, and the oxygen atoms are slightly negative
D. The hydrogen atom of a water molecule has high electronegativity
Compare and contrast competitive versus non-competitive inhibition.
Answer:
The competitive inhibitor binds to the active site and prevents the substrate from binding there. The noncompetitive inhibitor binds to a different site on the enzyme; it doesn't block substrate binding, but it causes other changes in the enzyme so that it can no longer catalyze the reaction efficiently.
The tendons of the tibialis posterior, flexor digitorum longus, and flexor hallucis longus each pass around which bony landmark before reaching their respective insertions?.
The tendons of the tibialis posterior, flexor digitorum longus, and flexor hallucis longus each pass around which bony landmark before reaching their respective insertions called Medial malleolus.
The bony protrusion on the inside side of the ankle is called the medial malleolus. This is the tibia's distal end, which serves as support for the ankle joint's inner side. Additionally, the deltoid ligament, a significant ligament on the inside of the ankle, is attached to the medial malleolus.
Medial malleolus fractures are relatively rare. When they do occur, they typically take place as a part of a more complicated pattern of ankle fractures, such as trimalleaolar fractures and bimalleolar fractures (involving the medial and lateral malleoli, or the outer and inner sides of the ankle, respectively) (involving these two parts along with the posterior malleolus, or back of the tibia).
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How long are dogs pregnant.Nothing personal
Answer:
58 – 68 days or about 2 months
label which cell is in hypertonic, hypotonic, and isotinoc solution.
Answer:
1. Hypotonic solution
2. Isotonic solution
3. Hypertonic solution
Which polysaccharide is an important component in the structure of many arthropods and fungi?.
Answer:
Chitin
Explanation:
Which polysaccharide is an important component in the structure of insect and fungal cells?
Chitin is a big, structural polysaccharide made up of chains of modified glucose that serves as a structural protein. Among the invertebrates and fish, chitin is found in the exoskeletons of insects, the cell walls of fungus, and some hard structures in their exoskeletons. Chitin is only second to cellulose in terms of abundance, with cellulose being the first.
Which polysaccharides are important for structural support in animals and plants?
Polysaccharides are mostly used for one of two purposes: energy storage or structural support, depending on their structure. Starch and glycogen are both very compact polymers that are utilized to store energy in the form of carbohydrates. Animal and plant cellulose, as well as chitin, are linear polymers that provide structural support in both plants and animals, respectively.
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Taxol is an anticancer drug extracted from the pacific yew tree that binds to microtubules and prevents their depolymerization. Which phase of mitosis or cell division would be inhibited by treatment with taxol?.
The phase of mitosis or cell division that would be inhibited by treatment with taxol an anticancer drug is the anaphase.
What is Taxol?
Taxol is a type of anticancer chemotherapeutic drug classified as a plant alkaloid that is anti-mitotic against cancerous cells which are actively dividing. It is used for the treatment of lung, ovarian, breasts, esophageal, prostate, melanoma, bladder, as well as other types of solid tumor cancers. Taxol an antimicrotubule agent by inhibiting the microtuble structures within the cell and blocking the cell cycle by stabilizing the microtubule cytoskeleton against depolymerization.
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PLEASE HELP!!‼️‼️‼️
the synthesis of proteins takes two steps *BLANK* and *BLANK*
transcription takes the information encoded in DNA and encodes into mRNA ,which heads out of the cells nucleus island into the *BLANK*.During translation, the mRNA works with a *BLANK* and tRNA to synthesize proteins. the first step in transcription is the partial unwinding of the DNA. once the DNA molecule is unwound at the correct location and enzyme called *BLANK* helps line up nucleotides to create a *BLANK* strand of mRNA.since mRNA is a *BLANK* -stranded molecule ,only one of the 2 strands of DNA is used as a template for a new RNA strand.
in translation mRNA is sent to the cytoplasm where it bonds with ribosomes the sites of *BLANK* . once the mRNA is in place *BLANK* each associated with specific amino acids , bind to the ribosomes in the right order.At its head tRNA has 3 nucleotides that make up an anticodon .translation begins with the binding of the mRNA chain to the ribosome. the first codon is always the start codon *BLANK* . the ribosome now slides down the mRNA.the appropriate tRNA carrying the appropriate amino acid pairs based with this next codon. A *BLANK* is formed between the 2 adjacent amino acid help by tRNA molecules forming the first 2 links of a chain. the process continues until one of the 3 *BLANK* condons appears. At that point the protein chain connected to the tRNA is released. translation is complete
•word bank•‼️‼️ transcription, cytoplasm , ribosome , protein synthesis ,tRNA molecules, single ,complementary, translation ,stop ,methionine, peptide bond , RNA polymerase.
Answer:
CORRECT ANSWERS !!
Transcription and translation
which heads out of the cells nucleus and into the Answer: Cytoplasm
During translation, the mRNA works with a Answer: ribosome
an enzyme called Answer: RNA polymerase
helps line up nucleotides to create a Answer: complementary
Since mRNA is a Answer single
where it bonds with ribosomes, the sites of Answer: protein synthesis.
Once the mRNA is in place, Answer: tRNA molecules
is always the start codon Answer: methionine,
A Answer peptide bond---- is formed between the amino acid attached to the tRNA
The process continues until one of the three Answer: stop
Explanation:
___are the basic units of structure and function in all living things.
Answer: Cells
Explanation: Cells are the basic units of structure and function in all living things.
Answer:
Cells
Explanation:
cells is the answer.
cancers cells with accumulation of other associated cells including tumor associated fibroblast, immune suppressive and immune modulatory, cell make a mass of cell environment called tumor microenvironment (tme).
True, the environment surrounding a tumor, including nearby blood arteries, immune cells, fibroblasts, signaling molecules, and the extracellular matrix, is known as the tumor microenvironment (TME) (ECM).
The microenvironment around the tumor and the tumor itself are intertwined and continually interacting. By generating extracellular signals, boosting tumor angiogenesis, and inducing peripheral immunological tolerance, tumors can have an impact on the milieu, whereas immune cells in the microenvironment can influence the development and spread of cancerous cells. The tumor interacts closely with the surrounding microenvironment, which is known to profoundly impact tumor progression by influencing processes that lead to tumor eradication, increased metastasis, or the establishment of dormant micrometastases.
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You are in a health food store looking at supplements to insure your good health, strength, and bodily functions. Which of the following products would be best to consider purchasing?
Four things to think about before selecting a dietary supplement
1. Choose the Proper Manufacturer: We must always take additional caution when selecting supplements because you'll be putting them in your body.
2. Recognize your diet.
3. Recognize your body.
4. Recognize the vitamins you require.
Supplements- Something ingested as part of a diet. A dietary supplement is used orally and typically comprises one or more ingredients (like minerals, vitamin, amino acid, herb, & enzyme). Various dietary supplements can help control some illnesses and enhance general health. For instance, vitamin D and calcium prevent bone loss and maintain bone strength. Certain birth abnormalities are less likely to occur thanks to folic acid.
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The repeating series of events that a cell goes through during
its life, including growth, DNA synthesis, and cell division are
called the abnormal cycle.
TRUE
FALSE
False The cell cycle is a repeating series of events that includes growth, DNA synthesis, and cell division
What is cell cycle ?During a cell's growth and division, a set of processes known as a cell cycle occur. In what is known as interphase, a cell spends the majority of its time expanding, replicating its chromosomes, and getting ready to divide. Following the cell's exit from interphase, it goes through mitosis to finish dividing.
These are the prophase, prometaphase, metaphase, anaphase, and telophase phases. It is sometimes referred to as the sixth phase of mitosis since cytokinesis is the final physical cell division that occurs after telophase.Learn more about Cell cycle here:
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Pine trees that are too tall or too short do not do as well as pine trees that are average in height. How is this an example of stabilizing selection?
Stabilizing selection is a condition where extreme traits have a negative outcome in the indivuals of a population, therefore the average value of the trait has the advantage. In this example, pine trees that are in the extremes of height (either tall or short) might have physiological disadvantages. On the other hand, pine trees with average height might escape this issues. For example, tall trees might have troubles with water transport, while short trees might have troubles with getting enough sunlight exposure. Average pine trees would not have disadvantages in either of the physiological examples described. With time, this trees (average height) will dominate in the population structure, whereas the other type of trees while be diminished.
What is the energy requirement in the photosynthesis
20 points
Examine the graph below. A crystalline substance is added to a beaker filled with water. The crystals dissolve, and a precipitate is formed. The bottom of the beaker is
too hot to touch. The temperature is monitored and the temperature data is shown on the graph below. At which time did the temperature first reach 65C?
The is time when temperature first reach 65C is 40
What is temperature?
A physical measure that describes how hot a substance or radiation is is called temperature.
There are three different types of temperature scales: those, like the SI scale, that are defined in terms of the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body; those that only rely on strictly macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are defined by practical empirical properties of particulates rather than by theoretical principles. With a thermometer, temperature is measured. It is calibrated in a number of temperature scales that historically defined themselves using different reference points and thermometric substances.
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