Master genes that affect development tend to be highly ____; therefore, similarities in patterns of embryonic development reflect shared ancestry that can be evolutionarily ancient.

About 1,500,000 bacteria are found in 1 milliliter of water of coastal ocean. How many bacteria will be there in 100 milliliters of water?

a-1.5*10^4 b-1.5*10^5 c-1.5*10^6 d--1.5*10^7 e-1.5*10^8

A group of population members all of the same age is called a ________.

A. species B. cohort C. tribe D. deme

Examples of short-day plants are:a

poinsettia. b. florist's chrysanthemum. c. spinach. d. black-eyed Susan. e. both poinsettias and chrysanthemums.

When do homologous chromosomes undergo recombination?

a. during anaphase b. during prophase c. during telophase d. during metaphase