Dna in the nucleus of a cell provides instructions on how proteins will be assembled. which of the following organelles builds the proteins based on the dna instructions?

a. plasma membrane

b. ribosomes

c. mitochondria

d. chloroplasts

When organisms convert from of energy, what usually results

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Polar zones are cold and tend to be dry because of a pressure system of cold. low high