How many genes are required to determine a polygenic trait?

A. one

B. two or more

C. several thousand

A rock called Shale is formed from the skeletons of ancient Coral animals. true or false

8. if you removed all the cheetahs from a large area of savanna which of the following is a direct effect that could be explained by the diagrams?

Briefly describe the DNA transcription process, which involves the transfer of the DNA genetic code onto an mRNA molecule. Include in this answer the role of enzymes.

If bacteria feeds on an earthworm what is the relationship between an earthworm and bacteria classified as 1. host - parasite 2. predator - prey 3. producer - consumer 4. scavenger - decomposer

The amount of energy the producers in this energy pyramid provide the primary consumers is 54,000 joules. From this amount, 540 joules are provided to tertiary consumers.

Classify the mutations as somatic or inherited A. Mutations in the KRAS gene in lung cells promote continuous cell growth B. Mutations of the BRAC1 gene in egg cells lead to breast cancer C.

The female determines the sex of mammals. True False

The definition of a hero is a. universally understood. b. determined by personal and cultural factors. c. clearly defined by a set of established traits. d. static and impartial.

Hydrogen ion concentration in vinegar

Why does it matter from which organ or tissue type the cancer developed