Answer:
The amount of energy in the first level determines how many animals can be supported on the subsequent levels.
The first level of the energy pyramid usually consists of the producers which are the main source of energy for a food web or a food chain. They determine that how many number of species can be supported by the particular ecosystems at each subsequent levels of the energy pyramid. They are the main source through which energy arises in an ecosystem.
Answer:
they move to an area with lower concentration.
Explanation:
Air particles always travel from an area where they are high in concentration to an area where they are low in concentration. as we can see that on the left hand side the numbers of o2 and co2 molecules are balanced.
Answer:A. the same number of chromosomes as was contained in the zygote.
Explanation:a zygote is formed when the sperm fertilize the egg .
After fertilization,the zygote undergoes cleavage.cleavage is the mitotic Division of the cells of a zygote to produce daughter cells.
These daughter cells are called blastomere,which contains the same number of chromosomes as the parent cells.the cells formed do not grow in size but continues to divide, forming a mass of cells.
This mass may be solid at first but as cleavage continues,the cells move away from the center,leaving a fluid filled cavity in the middle (blastocoel).
The mass of cells are called blastula.
Answer:
This organelle has two major functions: it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division). Only the cells of advanced organisms, known as eukaryotes, have a nucleus.
C <span>less contaminants would flow into the drainage basin</span>
