Which of the following occurred in the Precambrian period

What will be an ideal response?


oxygen accumulated
Photosynthesis envolved
multicellular organisms appeared for the first time

Biology & Microbiology

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In bacterial synthesis of polysaccharides, such as starch and glycogen, glucose is donated to the end of the growing chain by ADP-glucose. A similar reaction occurs in bacterial branching of phospholipids when phosphatidic acid is attached to a ________.

A. dihydroxyacetone phosphate B. fatty acyl-ATP C. acetyl-CoA D. cytidine diphosphate carrier

Biology & Microbiology

Taxonomy is

A.) the science of naming and classifying organisms B.) the sequence in which different groups evolved C.) the evolutionary history of a species D.) the study of life

Biology & Microbiology

Many freshwater invertebrates eliminate ammonia by...

a) simple diffusion across the skin b) simple diffusion across the gill membranes c) converting it to uric acid and eliminating it with solid wastes d) converting it to urea and eliminating it in their urine

Biology & Microbiology

Explain the anatomy of a typical neuron

What will be an ideal response?

Biology & Microbiology