QuestionOwl
Sign In Ask Questions

Biology

Which vitamin plays a primary role in vision and the development of body cells? a. vitamin A b. vitamin B6 c. vitamin C d. vitamin D

Which of these examples demonstrates homeostasis? A. a bird flies south for the winter and flies back north in the spring. B. An amoeba takes in food and digests it. C. A cat runs away when it hears a noise. D. A person's body increases blood flow to its cold feet.

A scientist at a chemical company designs and conducts an experiment to determine if a chemical made by the company is harmful to crops. To do this, he sprays the chemical on three plants he has in the laboratory. None of the plants survive. The scientist reports that the chemical is not harmful to crops and publishes a paper stating that the chemical should be sprayed on all fields. The scientist is being(1point a. Observant b. Unethical c. Skeptical d. Open-minded

Mimulus lewisii and Mimulus cardinalis occupy the same habitat but do not interbreed in nature. However, they can be crossed in the laboratory to produce fertile offspring. Which of the following is a likely reason that prevents these plants from interbreeding in nature? A) They only reproduce by self-pollination. B) They have incompatible gametes. C) They exhibit seasonal differences in flowering.

A 12 cm tube located below the larynx is the?

Which of these satisfies a basic need for a chipmunk? a. string b. burrow c. rocks d. highway

Which phase of the cell cycle is where nucleus of a cell divides to form two identical nuclei?

HELP! Which step was most likely performed by the researcher during the purification process? O A. The protein was separated from lipids. OB. The protein was stabilized using lipids. C. The protein was separated from nucleic acids. D. The protein was separated from nucleic acids.

Muscle cell activity increases and ATP decreases below the set-point, a sensor molecule detects low ATP and activates protein kinase A, protein kinase A activates protein kinase B, protein kinase B activates transporters that absorb glucose into the cell, glucose is metabolized. This is a:_______.

Which of these is a tRNA? The process of translation. Each letter marks a definite structure. Letter A marks a thread, to which the ribosome is attached. This thread is the template of translation. Letter B marks a structure bonded to Gly and located inside structure C. Letter C marks a structure, in which translation happens. Letter D marks a thread, the product of translation. Letter E marks constituent elements of the forming thread.

2621 - 2630 of 3569