The overall amount of water on our planet has remained about the same for two billion years.

We presume that meiosis evolved later than mitosis. What process would not have to evolve in cells undergoing meiosis in order to make this transition?

What did Mendel believe determined the characteristics of pea plants? A. a blending of the alleles from both parent plants B. inheritance of one allele, received from the healthier parent plant C.

Which is NOT a type of bone tissue? compact sponge surface marrow

Tonya used a microscope to observe five kinds of organisms in a sample of pond water. She wants to identify each organism using the dichotomous key below.

Which items exist on Earth because of green plants? Check all that apply.

Classify the mutations as somatic or inherited A. Mutations in the KRAS gene in lung cells promote continuous cell growth B. Mutations of the BRAC1 gene in egg cells lead to breast cancer C.

The female determines the sex of mammals. True False

The definition of a hero is a. universally understood. b. determined by personal and cultural factors. c. clearly defined by a set of established traits. d. static and impartial.

Hydrogen ion concentration in vinegar

Why does it matter from which organ or tissue type the cancer developed