Answer the following questions true (T) or false (F)
1. Isotopes differ from each other in the number of protons that they possess.
2. Atoms are electrically neutral.
3. The electrons of an atom contribute significantly to the mass of an atom.
1. FALSE
2. TRUE
3. FALSE
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What part of a taste sensory neuron is directly involved with receiving stimuli?
A. papillae B. microvilli C. supporting cells D. axons
Which of the following is inconsistent with the current understanding of how plants and microbes interact with each other?
A. Microbes produce chemical signaling molecules that plants can react to. B. Plants are able to send chemical signals to microbes but they are not able to receive signals from the microbes. C. Plants produce chemical signaling molecules that microbes can detect and react to. D. All of these statements are inconsistent with our understanding of how plants and microbes interact with each other.
How does a cell bind with a hormone molecule?
a. It increases its receptor levels. b. Cells circulate through the body looking for hormones to which they can bind. c. Molecules in the cell membrane have a binding site that matches a binding site on the hormone. d. It decreases its receptor levels.
Pleomorphic bacteria
A. have a slightly curved rod shape. B. are flexible spirals. C. are both bacillus and coccobacillus in shape. D. are roughly spherical. E. vary in size and shape.