Biology, 15.02.2020 00:12 emilyharper
Hormones often cause a cell to elicit multiple responses; this is because . A. there are thousands of receptors on the cell membrane B. during protein kinase activation, enzymes phosphorylate many other enzymes C. the protein kinases are rapidly metabolized D. the receptors bind to several hormones at the same time
Answers: 3
Biology, 21.06.2019 19:00
The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.
Answers: 1
Biology, 21.06.2019 19:40
Astudent drew the following flowchart to show the movement of nutrients. soil → roots → plants →? where does nitrogen go next? a. directly into nearby animals as nutrition b. directly into aquifers through condensation c. directly into the air through evaporation d. directly into nearby plants during fixation
Answers: 1
Biology, 21.06.2019 21:30
Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1
Answers: 1
Hormones often cause a cell to elicit multiple responses; this is because . A. there are thousands o...
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