Cellulose is found throughout the cell walls of plant cells. cellulose makes cell walls rigid, which indicates that cellulose is a

A) carbohydrate

B) lipid

C) nucleic acid

D) protein

Phosphofructokinase is a four-subunit protein with four active sites. phosphofructokinase catalyzes step 3 of glycolysis, converting fructose-6-phosphate to fructose-1,6-bisphosphate. phosphoenolpyruvate (pep) is the product of step 9 of glycolysis.

Which descriptions are true regarding different muscle types? check all that apply. cardiac and skeletal muscles are striated. skeletal and smooth muscles are nonstriated. smooth and cardiac muscles are voluntary.

If sunlight suddenly limited in an ecosystem, what might result?

Which statement accurately compares in the human circulatory system to cells in the human nervous system

Since no two populations can occupy exactly the same niche, how can owls and hawks coexist?

if research is restricted. then the new discoveries made are limited. which action is most likely to increase the number of discoveries scientist can make?

Which statement about nuclear fission is false? a: nuclear fission takes place in the core of the stars b: the fuel for nuclear fission is often uranium c: nuclear fission releases large amount of energy d: nuclear fission is used to generate

Some monkey flowers (Mimulus guttatus) living near the sites of copper mines can grow in soil containing high concentrations of copper, which is toxic to most plants. Copper tolerance is a heritable trait. Select the three statements that are true.

The lowest level of environmental complexity that includes both living and nonliving factors is the A: Biome B: Community C: Ecosystem D: Biosphere

Which part of the endocrine system is located in the middle of the brain