Prenatal detection of chromosomal abnormalities is accomplished chiefly by

Which organism below would show evidence of evolution the fastest? fungi bacteria humans rabbits

A gastrovascular cavity is a digestive tract with two openings-a mouth and an anus. true or false

Most of the Blackland Prairie ecoregion of Texas has been converted to farmland and ranches. Between crop harvests, some farmers grow a type of plant called a cover crop, while other farmers leave the fields bare.

Add right is a photograph of a multicellular plant called a Primrose. List three conclusions you can make about the primrose as a living thing.

Which of the following is a secondary color? A. blue B. orange C. red D. yellow

In snapdragons, red flower color (R) is incompletely dominant to white (r), with heterozygous plants being pink. The broad-leaf allele (B) is incompletely dominant over narrow leaves (b), with the heterozygous plants having medium-width leaves.

Carol eats 800 kilocalories a day to lose weight. She is 60 years old. Carol has been walking briskly 60 minutes daily for the past 2 months.

Distinguish between anaerobic and aerobic cell respiration in eukaryotes.

What change would most likely decrease the competition of food among a chipmunk population in an ecosystem?

How much energy do consumers obtain when they eat