Biochemicals, known as __________, are produced by glands, travel through the bloodstream, and alter the metabolism of specific target cells.

A. enzymes

B. pheromones

C. neurotransmitters

D. hormones

E. pectines


D. hormones

Biology & Microbiology

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Most fossil fuels mined from the sea are mined in coastal areas that make up part of the continental shelf. Very little exploration for fossil fuels is done in the deep sea. What are some reasons for this?

What will be an ideal response?

Biology & Microbiology

What do we call the large, conspicuous green organisms pictured in this tide pool?

1.sea stars 2.chitons 3.limpets 4.anemones

Biology & Microbiology

There are a series of cell divisions that produce no cell growth during the first four days following fertilization. This process is referred to as

A) cleavage. B) conceptus. C) morphogenesis. D) implantation. E) differentiation.

Biology & Microbiology

The genes you inherited from your parents are an example of 

A. speciation. B. evolution. C. adaptive radiation. D. gene flow.

Biology & Microbiology