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Damm [24]
3 years ago
7

Explain how the adaptations of the pentadactyl limbs are adapted for swimming in whales, running in lizards and grasping in frog

s and humans

Biology
1 answer:
irinina [24]3 years ago
7 0
This is an example of homologous structures.

Each of these limbs has adapted to enable organisms to survive in their environment.

All these animals have similar embryonic tissues, meaning they looked very similar as an embryo.

Homologous structures provide evidence that these animals all came from a common ancestor.

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3 years ago
What happens when light energy excites electrons in photosystem II?
Vlada [557]

Answer:

C. Electrons are released into the electron transport system.

Explanation:

Photosynthesis has both light dependent processes and light-independent processes. In the light-dependent reactions, photosystem II is the first protein complex. Photosystem II is present in the thylakoid membrane of plants.

<em>When the photons or light energy hits photosystem II, the free electron excites and released into the electron transport system (series of proteins). </em>The electron then passes through electron transport system and the energy from the electron fuels the hydrogen ions to move against their concentration gradient. Once the energy is utilized, the electron is accepted by photosystem I.

Hence, the correct option is C.

4 0
3 years ago
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koban [17]

Answer:

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6 0
2 years ago
When the blood glucose level decreases during a fast or between meals, the pancreas releases glucagon. Glucagon signals the live
Liula [17]

Answer:

Glucagon signals the liver to start producing glucose.

Explanation:

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3 years ago
What are some plants that grow in mountains
xxTIMURxx [149]

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Trees & Shrubs

Explanation:

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