D. Strong ....................
Answer:
The first human ancestors appeared between five million and seven million years ago, probably when some apelike creatures in Africa began to walk habitually on two legs. They were flaking crude stone tools by 2.5 million years ago. Then some of them spread from Africa into Asia and Europe after two million years ago.
Answer:
They all include an exchange of gases with the atmosphere.
The carbon, oxygen, and nitrogen cycles are biogeochemical cycles meaning the chemicals spend a portion during the cycle in living things ( bio) and a portion in the nonliving environment
The water molecules labeled A in Figure 4.1 are going to the thylakoids to take part in Light-Dependent Reactions.
The interior membrane structure of the chloroplast is composed of interconnecting disc-like sacs called thylakoids. They are discovered floating in the stroma. Grana are stacks of thylakoids that are arranged in a particular way. The thylakoid membrane contains chlorophyll, a photosynthetic pigment that absorbs light during photosynthesis.
The interior membranes of cyanobacteria and chloroplasts, known as thylakoids, serve as a platform for the photochemical reactions that take place during photosynthesis.
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