Why are there many separate ecosystems in a rain forest?
a. different conditions support different organisms.
b. there are three levels of consumers in rain forests.
c. rain forests have very few primary consumers.
d. there are three different seasons in a rain forest.

In the human body fibrinogen is necessary for sealing cuts and stopping the loss of blood. since fibrinogen is made of chains of amino acids it is an example of which type of organic molecule

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?