How do homologous structures provide evidence for evolution?

Answers

Answer 1
Answer: The presence of a homologous structure suggests common ancestry, and further suggests that the nearest common ancestor of two organisms had the trait which is homologous. Comparison of several modern organisms with different variations of the same homologous structure can suggest what the original ancestor's actual characteristics were, and comparison of the structure in different organisms can also suggest which organisms are more or less closely related

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Which two of these characteristics does an organism with bilateral symmetry possess?lack of tissue
symmetrical in many ways across a central axis
presence of a head
development from three cell layers

Answers

Answer:

symmetrical in many ways across a central axis

presence of a head

Explanation:

Right!!

The answer is B and C

In a certain plant, yellow leaves are dominant (Y) and red leaves are recessive (y). A plant with genotype Yy and a plant with Yy are crossed. If they have four offspring, how many would you predict would have red leaves?

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1 plant. This is because offspring will only have red leaves if it receives yy, and there is a 25% chance of this, so 1/4 of the offspring will be predicted to have red leaves.

Need These Answers ASAP Thanks

Answers

Answer:

An increase in the number of invasive species leads to a decrease in the diversity index. This species can alter the food web within an ecosystem by eliminating the local food sources leaving no food for the faunas. If plant diversity declines, the habitat would definitely lose its balance. The ecosystem would lose its balance. Plants are considered producers and are always the beginning of the food chain. Without plants, animals that consume plants will definitely decline it number; thus, also the consumers on top of the chain.

Explanation:

Which is least likely to be a reservoir for fresh water

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Oceans would least likely to be a reservoir for fresh water :)

Explain how the blood from an injured fish can reach the nose of a shark

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The blood from an injured fish can reach the nose of a shark through the water. The shark’s olfactory organs detect the scent of the blood molecules dissolved in the water, which triggers the shark’s hunting behaviour

Electricity is added to recharge a battery. What is added to ADP to form ATP?A second ribose group
A third phosphate group
A third ribose group
A second phosphate group

I'm thinking third phosphate group?

Answers

Electricity is added to recharge a battery. A third phosphate group  is added to ADP to form ATP.

ATP or Adenosine triphosphate contains adenine, ribose and 3 phosphate groups.

ADP is converted to ATP by the following reaction:

ADP+Pi+energy⇄ATP

The analogy between battery and ATP can be explained as ATP is higher energy form and ADP is lower energy form like charged and uncharged form of the battery. When the terminal or third phosphate is removed from the ATP it becomes ADP and releases energy like a battery. The additional phosphate group when added to ADP forms the ATP molecule like the energy spent by the batteries are recharged by putting in additional energy. Here the additional energy is provided by the third phosphate group.

Answer:

The correct answer is B) A third phosphate group.                                

Explanation:

ATP is Adenosine Triphosphate and ADP is Adenosine Diphosphate.

ADP gets converted into ATP in presence of inorganic phosphate and energy, irrespective of whether the energy is obtained from sunlight or from certain exothermic reactions. ATP is converted into ADP, releasing energy and inorganic phosphate.

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