What part of the gi tract prevents a person from choking while swallowing?

a. pyloric sphincter

b. epiglottis

c. upper esophageal sphincter

d. mouth?

Heat is added to an element causing the atoms to bounce back and forth in the molecule. This is an example of which type of motion? Question 2 options: a. Rotational motion b. Vibrational motion c. Translational motion d. Inertia

Does the appearance of the cavefish and the minnow suggest a common ancestry? Why?

A woman with severe discoloration of her tooth enamel has four children with a man who has normal tooth enamel. Two of the children, a boy (Bob) and a girl (Gladys) have discolored teeth.

Why may some young adults go through a quarter-life crisis? A. They are entering middle age and feel distressed about growing old. B. They feel insecure about themselves and their future. C. They have been promoted to more secure, better-paying jobs.

Mid-ocean ridges, which contribute to the process of sea-floor spreading, form as a result of

A cell begins to send out incorrect chemical signals to neighboring cells. During which phase of the cell cycle did the cause of the change most likely happen? G1 phase G2 phase M phase S phase

Which of these organisms needs care from its parents after birth? A. frog B. turtle C. mouse D. snake

Variant Creutzfeldt-Jakob disease, listeriosis, anthrax, and E. coli 0157-H7 infections all have which of the following in common? a. All four diseases can be transmitted from cattle to humans b. All four diseases are caused by bacteria c.

Which layer of skin contains a large amount of adipose tissue?

1. The role of an organism in the ecosystem 1 Called to species niche mos habitat environment