Which best characterizes the precambrian era?

a. abundant plants and animalsb. dinosaursc. small, one-celled organisms and primitive jellyfishd. extensive mountain building?

How could crossing over affect the distribution of the four alleles: A, a, B, and b? A. Crossing over would always keep A and B together on the same chromosome, and keep a and b together on the same chromosome. B.

Which types of polygons are the faces of a dodecahedron?

Surgical procedures were most impacted by: vaccines antiseptics antibiotics X-rays

An organic molecule will always contain ___ carbon, carbon and hydrogen, hydrogen, O, H, and C

What's the difference between a person with alleles Aa and a person with the alleles AA a. phenotype b. genotype c. phenotype and genotypes d. nothing

Through what process does water enter the atmosphere from your body as you sweat

Mutations that hinder the survival of an organism

What is the predominant fiber type in the postural trunk muscles?

Human sperm cells and egg cells are A) haploid, each containing 23 chromosomes B) haploid, each containing 46 chromosomes C) diploid, each containing 23 chromosomes D) diploid, each containing 46 chromosomes

Produces gametes used in sexual reproduction