17. What's mass?

A. A measure of an element's attraction for electrons

B. The force that gravity exerts upon an object

C. The sum of the number of protons and neutrons in an atom

D. A measure of the amount of matter an object contains

The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of a. a body cavity. c. mesoderm b. a complete digestive tract d. true tissues.

What is an organized procedure to study something under controlled conditions

Identify the genotype of the hornless cow at the top of the pedigree. Use H for hornless and h for horned. Remember that cows are diploid, and a single gene determines the horned/hornless trait.

The primary role of perspiration in homeostasis is to carry excess A. heat from the body. B. fluids from the body. C. waste from the body. D. lactic acid from the body.

Solve for Y in the following matrix equation. -2 - 3 ( -10 - 5 -7 - 11) = ( 24 - 7 19 5 )

Which of the following describes a relationship of commensalism? A. A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat. B. Oxpecker Birds eat parasitic tricks off the backs of zebras C.

Which of these statements about osmosis and active transport is NOT correct? A) Both endocytosis and active transport require cell energy. B) Osmosis requires cell energy while active transport does not.

Which of the following two cycles are the most closely related in their role in sustaining life?

2. Which type of joint has the most amount of movement?

You are testing 3 new herbicides, A, B, and C, to control itch grass and to compare the effectiveness of the herbicides with a currently used herbicide, Round-Up, and the treatment with just water.