Sperm cells and egg cells are needed for human sexual reproduction. Describe in detail the type of cell division that produces sperm cells. (4 marks)

Identify the cavity that develops entirely from the mesoderm.

You are looking at chromosome 1 in a human being. Assuming there is no crossing over, what is the source of all the genes on this chromosome?

What is a new method of for computing heritability that may replace the use of twin studies? Case studies. Total variance statistics. Genome-wide association studies Adoption studies.

There are two mice that are brown in color. Brown is a dominant allele in mice. In order to determine whether the mice are homozygous dominant or heterozygous, which of the following mice could you cross with them?

A 72-year-old woman with complaints of increasing fatigue has completed a series of fecal occult blood tests that indicate the presence of blood in her stool.

The storage of heat in the lower layer of the atmosphere due to certain gases absoring heat is called

A red blood cell is 8 μm in diameter. If drawn 100 times larger than its actual size, what diameter will the drawing be in mm? A. 0.08 mm B. 0.8 mm C. 8 mm D. 80 mm

Which kind of biologist would most likely use satellite technology?

What is the complementary base of adenine in DNA? guanine cytosine thymine uracil

Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride cells in the gills aid fish in the removal of excess ions? A.