Why is colony collapse disorder (CCD) a
problem for all of us?
a. the pathogen responsible for CCD can
infect multiple hosts
b. the decline in honey production could cause
our economy to collapse
c. bees are the main pollinators of about half
of our agricultural crops
d. actually, it’s not-- there are other
pollinators that can take over for the bees
e. more than one of these (a through c) is a
problem for all of us
C
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According to the latest research, what statement best describes the first eukaryote?
a. It lacked a nucleus, a mitochondrion, or a chloroplast. b. It lacked a nucleus, but contained a mitochondrion and a chloroplast. c. It contained a nucleus and a chloroplast, but not a mitochondrion. d. It contained a nucleus and a mitochondrion, but not a chloroplast. e. It contained a nucleus, a mitochondrion, and a chloroplast.
Mendel was quite ahead of his time in genetics, and many of his hypotheses have stood up to newer discoveries. However, we now know that independent assortment has many exceptions. Which of the following is an exception to the law of independent assortment?
a. monohybrid cross b. test cross c. gene linkage d. random mutation
Four of the five choices listed below are
characteristics of periderm. Select the exception. a. dermal tissue b. suberin c. cork d. waterproof protection e. primary tissue
Scientists have discovered gene products, including the hormone ELH, that control all components of egg-laying behavior in Aplysia slugs. This discovery confirms that
A. the egg-laying behavior has absolutely no nervous system involvement. B. genes can control endocrine gland secretions that control behavior. C. this slug could avoid being eaten by garter snakes. D. genes only influence physiology and structure but not behavior. E. the egg-laying behavior is innate or hardwired into the slug's brain.