What pigment is used in human vision?

A) chlorophyll a

B) beta-carotene

C) retinal

D) vitamin A

E) ferredoxin

What term refers to a genetic change that occurs due to the evolutionary process, which consists of modifications in the structure or attributes of an organism?

What are the abiotic and biotic factors of a park?

Which is a possible intended result of hybridization in plants? A) The plants survive without water. B) The parent plants become extinct. C) The plants become resistant to disease. D) Two different types of leaves grow on a single plant.

A soccer player has been sprinting up and down the field. She is breathing very hard and has a burning sensation in her muscles. Which of the following is the most likely cause of her symptoms? A.

In plants, meristematic cells are most similar to which type of cells in animal tissues?

Organisms do not adapt as a result of competition for resources. true or false

How do most cancers arise? question 1 choices choice a., from a single mutations arising simultaneously in a cluster of cells choice b., from a series of mutations that arise in the descendants of a single somatic cell choice c.

Briefly describe your experimental design for the first experiment. Make sure to include: a. The conditions you used to feed your mice (e. g., the foods you fed your mouse and the length of time the mouse was in the light box) b.

What caused the earth to develop layers as it cooled?

What is a difference between Newston's laws of motion and Elinstein's theory of relativity?