Answer:
Option B, Foundation species
Some examples of foundation species are - Corals, Earthworms, Beavers etc.
Answer and Explanation:
Oxygen has 8 plus-charged protons. The number of minus-charged electrons is 8 electrons. Atoms have equal number of protons as electrons. However, protons are found in the nucleus of an atom and electrons in the outermost shells in constant motion.
Answer: through the process of photosynthesis
Explanation:
carbon dioxide is pulled from the air to produce food made from carbon for plant growth. Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.
Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population.
Answer: b. Nitrogen; Oxygen
Explanation:
The air is a mixture of gases in the following percentage;
Nitrogen; 78%
Oxygen : 21%
Carbon(IV)Oxide : 0.03%
Argon : 0.9%
Others ( minute traces of Neon, Helium, Methane e.t.c) : 0.17%
