How many amino acids must be obtained in the diet because they cannot be made by the body? A. 2 B. 5 C. 10 D. 20

Unlike ionic bonds, covalent bonds involve the A. gain of one or more electrons by one atom from another. B. loss of one or more electrons from one atom to another. C. development of positively and negatively charged ions. D.

The first plants that grow after a disturbance are called what?

What do you expect to find at meristems

What is the process by which an rna strand is converted to protein called? what is the role of the codon in this process? how are codons and amino acids related?

Why are groups of small cells better then one large cell at moving material in and out

The theory of endosymbiosis suggests that the ancestors of mitochondria were A) formed due an error in cytokinesis. B) once free-living heterotrophic prokaryotic cells. C) parasitic cells that lived within more complex organisms.

Wat biotic and abiotic factors control viral activity in the sea

Which structure is Chad drew a diagram to compare animal cells and bacterial cells. Which label belongs in the area marked X? found in some but not all plant cells?

Waves crash against the shores of an island, creating beaches and gullies. In this scenario, what is the primary landform and what is the secondary landform? A. primary landform: island, secondary landform: beach and gully B.

What is one substance that uses facilitated transport