D because they are complete systems
Answer:
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Answer:
Release of large numbers of eggs/sperm into the water during reproduction cycles.
Explanation:
Adaptation may be defined as the change in the physical, physiological and chemical changes in the organisms that helps them to survive in their environment.
The organisms living in the rocky intertidal zone shows adaptations as they are more darker in color and has simple body organisation. The algae,crabs and snails live in the intertidal zone. They have small number of offspring that protect them from the predators.
Thus, the answer is release of large numbers of eggs/sperm into the water during reproduction cycles.
Answer:
They tunnel through the soil, which allows air to enter.
Explanation:
Earthworms are considered to be agriculturally friendly living organisms that hold immense importance in improving the growth and productivity of plants.
They live in the soil and feed on the debris of plants such as manure, grasses, roots and dead leaves. They extensively channel and tunnel through soils while moving that causes loosening of the soil resulting in more aeration of the soil. The more the soil aeration is, the better soil drainage is.
Studies have shown that soil containing earthworms have ten times better drainage than soils that donot have earthworms. Therefore, C is the best option.
Hope it help!
