What four major divisions make up the history of life on earth in the geologic time scale

Josiah says this is a phylogenetic tree of the dinosaurs. Maleek says it is a cladogram of the dinosaurs. Who is correct? Josiah is correct. Maleek is correct. Both are correct. Neither is correct.

Which of the following is a true statement about sexual vs. asexual reproduction? A. Asexual reproduction, but not sexual reproduction, is characteristic of plants and fungi. B.

The most common drug that can affect nutrition in older people is

Consider the regulation of galactose metabolism through GAL4. Which of the following would result from a mutation that allowed GAL3 to bind to GAL80 in the absence of galactose? A.

Of the following steps in a scientific investigation, the last to be done is usually: A. experimenting B. observing C. producing a model D. hypothesizing

Diploid nuclei of the ascomycete Neurospora crassa contain 14 chromosomes. A single diploid cell in an ascus will undergo one round of meiosis, followed in each of the daughter cells by one round of mitosis, producing a total of eight ascospores.

Is a theory an opening statement

Which part of an amino acid has the greatest impact of the overall structure of a protein? A. the amino groupB. the R groupC. the carboxyl groupD. both A and C

The type of fossil where the name literally means "turning to stone".

Flash flooding is most likely to occur when rain falls on where, and why?