QuestionOwl
Sign In Ask Questions

Biology

The volume of space in which a given electron occurs 90% of the time is called A. an orbital. B. a nucleus. C. an atom D. a molecule. E. a bond

Mendel crossed purebred purple-flowered plants with purebred white-flowered plants, and all of the resultingoffspring produced purple flowers. The offspring are all ________, and the allele for purple flowers is __. A) heterozygotes... recessive B) heterozygotes... dominant C) homozygotes... recessive D) homozygotes... dominant

The united states proposes the open door policy for china. For what reason was the proposal made?

genetics is the study of

11. Which statement concerning the climax stage of an ecological succession is correct? A) It is the first community to inhabit an area.
 B) It consists entirely of plants.
 C) It persists until the environment changes. D) It changes rapidly.

what are two essential characteristics of a good experiment

Aquaporins: a. play an active role in the regulation of water movement in the xylem during mild drought b. are proteins embedded in the cell walls that transport water c. play an active role in the regulation of water movement outside the xylem during mild drought d. are proteins embedded in the mesophyll and bundle sheath apoplast that transport water

Suppose two people are exposed to equal doses of radiation (equal number of rads) inside their bodies. Suppose that the first person is exposed to alpha radiation, while the second person is exposed to protons. How many times worse is the biological risk for the first person than the second as a result of radiation weighting?

Cosmologists believe that the universe has been expanding since the Big Bang. Astronomers observe evidence of this expansion when viewing distant stars through which phenomenon?A) Redshift B) Blueshift C) Gamma pulse D) Background radiation

Based on this picture, how do you think a DNA molecule makes a copy of itself? (Hint: Look at the bottom two “rungs” of the ladder.) This a gizmo Plz help

3381 - 3390 of 3569