What are the two main categories of ecosystems?

a.

effective and ineffective

b.

marine and freshwater

c.

biotic and abiotic

d.

aquatic and terrestrial

What is the name of the outher most layer that forms a boundary around the outside of each cell

Why do the body structures of some species support Darwin's theories? because they have similar functions because they are very different because they have similar limbs because they are the same

A volcano erupts and creates a new island. This is an example of what type of succession? A. Primary Succession B. Secondary Succession C. First Succession D. Final Succession

What temperature does catalase peek in humans?

What might cause an organism to lose a necessity of life?

Cell is to tissue as A) cell is to organ system B) organ system is to Tissue C) Organ system is to organ D) tissue is to organ

Which of the following is composed of myosin protein? hick filaments thin filaments Z discs all myofilaments

Sex determination in mammala

What roles do membrane proteins play in making the cell membrane selectively permeable

What are telomeres? What are telomeres? ""junk DNA"" present throughout the length of our chromosomes protein caps found on the ends of chromosomes DNA sequences which code for making proteins that regulate cell division regions of DNA at the end of