At the end of which period did nearly three quarters of all species of life on earth go extinct in a very short time interval

Cambrian

jurassic

triassic

cretaceous

If a cell normally has 12 chromosomes how many chromosomes will be present if ach cell at the end of meiosis 2 if a single pair of homologous chromosomes fail to separate at anaphase 1

A nonnative species of beetle is introduced into a woodland ecosystem. Which of the following would be most likely to stop the species from becoming invasive? O A. There are no other beetle species living in the woodland ecosystem. B.

An organism is unicellular, contains organelles, and can produce its own nutrients to use as an energy source. into which kingdom should this organism be placed? A.) Animalia B.) Fungi C.) Plantae D.) Protista

Homeostasis in the human body is controlled primarily by which two organ systems

Molecules that are eaten and not eliminated in feces are said to be

Which statement is most likely the explanation of why certain animals are able to adapt to changing environments answer

A sample of DNA contains 1000 guanine bases how many citizens bases does it co rain?

Sophie says dolphins and sharks look very similar, so they must be related. Jake disagrees, saying DNA evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos.

When caring for a client with a tracheostomy, the nurse would perform which recommended action?

This schedule number contains drugs with low potential abuse, medical use, and the lowest potential for dependency