Another name for unicellular organisms that dominated Earth up to the Precambrian time is

A. eukaryotes.

B. cyanobacteria.

C. stromatolites

D. prokaryotes.

The adaptive radiation of animals often follows mass extinctions. How does this support the punctuated equilibrium theory?

describe 2 observation of water that provide evidence that water molecules are attracted to one another

Which statement of the scientific method is true a) the scientific method involves developing and testing questions b) the scientific method is a linear approach to accumulating scientific knowledge c) the scientific method is used in different ways

An alteration in the nucleotide sequence of a gene can alter the gene product. each sentence below is made up of three-letter words, representing mrna codons.

Atomsa. are extremely large. b. can be broken down. c. are extremely small.

A pregnant woman at 37 weeks gestation calls the clinic to say she thinks that she is in labor. the nurse instructs the woman to go to the health care facility based on the client's report of contractions that are:

A human nose is capable of detecting how many basic odors? a. 20 b. 40 c. 49 d. 50

Why is a control necessary to have when designing an experiment?

Why are there many separate ecosystems in a rainforest

Describe several ways in which the cheek epithelial cells differed from the potato, tomato, and onion cells? be specific