The best way to reclaim an ecosystem that is extensively damaged is to ____
a. allow natural succession to take over
b. remove all predators from the area
c. seed the area with a type of grass
d. bring in beneficial insects
e. implement ecological restoration
ANSWER: e
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The nucleolus is the site of:
A. protein synthesis. B. uncoiling and unraveling of chromosomes. C. ribosome assembly. D. lipid synthesis. E. chromosome replication.
Some botanists consider the stoneworts to be a link between the higher plants and the algae. As you will learn in future exercises, higher plants, such as the mosses, have both haploid and diploid stages that are multicellular.
(a) Describe the multicellular organism in the charophytes. (b) Is this organism haploid or diploid? (c) Is the zygote haploid or diploid? (d) Is the zygote unicellular or multicellular?
To restart a heart, rescuers use
a. CPR. b. a defibrillator. c. CPR and a defibrillator. d. serotonin injections. e. all of these.
If nondisjunction occurs during meiosis I, ____
a. two gametes will be normal and two will be missing one chromosome b. two gametes will be normal and two will have one extra chromosome
c. three gametes will be normal and one will have two extra chromosomes d. all gametes will be normal e. all gametes will be abnormal