The change in population size is measured in terms
of
a. birth rates.
b. death rates.
c. the number of individuals entering the
population.
d. the number of individuals leaving the
population.
e. all of these.
Answer: e
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You are studying the function of a recently identified gene in C. elegans. You perform genetic screens for several months in an attempt to isolate loss-of-function gene mutations, but your efforts are unsuccessful. Your advisor suggests you try another approach to eliminate gene function. The best technique to accomplish this goal would be
A. to design a repressor to bind to the operon of this gene. B. use a histone deacetylase to induce a transcriptionally inactive state. C. use a C. elegans strain with a homozygous TFIID mutation to prevent the translation initiation complex from forming. D. use RNA interference to prevent mRNA translation. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about loss-of-function mutations? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What is a disadvantage of sexual reproduction?
a. Sexual reproduction generates less genetic diversity than asexual reproduction. b. Sexual reproduction decreases the chance that offspring may be able to live and reproduce in diverse environments. c. Sexual reproduction decreases the chance that, in a changing environment, at least some offspring will grow and reproduce successfully. d. Sexual reproduction produces fewer offspring per parent than asexual reproduction. e. On average, sexual reproduction generates unequal numbers of males and females.
This stage of mitosis is characterized by the disassembly of spindle apparatus, the reestablishment of the nuclear membrane, and the decondensation of the chromosomes
A. telophase. B. anaphase. C. metaphase. D. prometaphase.
The human genome is divided into linear segments and packaged into structures called chromosomes. What is the total number of chromosomes found in each of the somatic cells in your body?
(a) 22 (b) 23 (c) 44 (d) 46