Which form of natural selection on polygenic traits results in the creation of two distinct phenotypes? A. Directional selection B. Disruptive selection C. Stabilizing selection D. Artificial selection

The air temperature of Lawrence is higher than the air temperature of Norristown. What is the main cause for the different air temperatures?

a researcher identifies the the nucleotide sequence AAC in a long strand of RNA inside a nucleus. in the genetic code, AAC codes for the amino acid asparagine.

Which composition of water moves within a deep water current A. cold and high salinity B. cold and low salinity C. warm and high salinity d. warm and low salinity

Which of the following is NOT true of all cells? Group of answer choices They move by means of flagella. They assimilate nutrients. They have DNA as their genetic material. They synthesize new cellular material such as small and large molecules.

What provides support for individual plact cells and for the entire plant?

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

The nerve cells in the human nervous system seldom undergo mitosis. Based on this information, explain why complete recovery from injuries to the nervous system usually doesn't occur.

A protein was purified to homo - geneity. Determination of the mass by gel-filtration chro - matography yields 60 kDa. Chromatography in the pres - ence of 6 M urea yields a 30-kDa species.

Which of the following tools should a scientist use to measure an object in meters? Electronic balance Pan balance Tape measure Thermometer

What causes nematocysts to discharge?