Answer:
Among the oldest methods of preservation are drying, refrigeration, and fermentation. Modern methods include canning, pasteurization, freezing, irradiation, and the addition of chemicals.
Explanation:
<u><em>Answer: The Calvin cycle is a process that plants and algae use to turn carbon dioxide from the air.</em></u>
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Answer: Stomata densities change in response to changing atmospheric levels of carbon dioxide. Stomata may also vary in response to the amount of annual rainfall in different localities.
Explanation:
The best description of predictable development of plant structure in an area over time is primary succession. The correct option is a.
<h3>What is succession?</h3>
Changes in the physical environment and the population of the species cause succession. There are two types of succession: primary and secondary succession.
Nudation, invasion, competition and coaction, reaction, and stabilization are the five stages of ecological succession. Autogenic succession is derived by biotic factor in an ecosystem.
Thus, the correct option is a. primary succession.
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I believe the answer is B, primary active transport. Root hair cells in plant use active transport to absorb mineral ions such as nitrates from the soil. The concentrations of minerals in the soil are lower in the soil than in within the root hair cell, therefore the transport will be against the concentration gradient which does not favor diffusion, therefore the pant has to use active transport.
