What atomspheric gas is used by marine organisms to make their shells

There is observable change from each kind of organism into some other kind. True or False?

A nursing instructor is explaining the role of vascular smooth muscle cells in relation to increases in the systemic circulation.

A horse has 64 chromosomes and a donkey has 62 chromosomes. A cross between a female horse and a male donkey produces a mule, which is usually sterile.

What factor has the greatest effect on species diversity

Based on the opinions of most researchers as represented by the Venn diagram, where would the character trait of personality fall within the influences of heredity and environment?

Consider the Ras signal-transduction pathway. Suppose a mutation occurred in the gene that encodes the transmembrane receptor to which a growth factor binds. The mutation no longer allows the growth factor to bind to the receptor.

Which of these have prokaryotic cells? A. snails B. bacteria C. frogs D. food

How can earths plates move

Iron reacts with atmospheric oxygen to form oxide or ferric oxide

Which of the following organisms is most likely to survive? a. the producers in a food web b. the top carnivore in a food chain c. a herbivore in a food chain d. the top carnivore in a food web ITS NOT B