As different cell lineages use different subsets of
genes during development, they become specialized
through a process called __________. Fill in the blank(s) with the appropriate word(s).
Answer: differentiation
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Sugars leave the source region and immediately enter into a ____, followed by direct movement into the ____
a. pit, perforation plate b. companion cell; sieve element c. pit, vessel element d. plasmodesmata, sink e. phloem tube, companion cell
Crossing over is one of the most important
events in meiosis because
a. it produces new combinations of alleles on chromosomes. b. separation of homologous chromosomes occurs. c. separation of sister chromatids occurs. d. it results in the production of haploid gametes. e. it aligns homologous chromosomes at the center of the cell so that they can be separated in anaphase II
How does the distribution shown on the map of alleles for the B blood type support the hypothesis that there are no biological races of humans?
A) All human groups show the same frequency of this allele. B) A distinct frequency pattern of this allele is found in each human group. C) A gradient of frequency of the allele is found from its origin in Asia outward to Europe. D) There's no pattern with respect to frequency of this allele throughout Asia and Europe.
Cellular respiration oxidizes _______, and ______ is given off
What will be an ideal response?