The markers that identify "self" are actually
A) genes.
B) proteins.
C) lipids.
D) small surface bumps.
E) triplet codons
Ans: B) proteins.
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What are some challenges of using mutations only to adapt to changing environmental conditions? How does gene regulation overcome these challenges?
What will be an ideal response?
Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant
Fifty offspring are produced in the following frequency: 30 = tall 20 = short (a) What frequency of tall and short plants is expected? (b) To test the goodness of fit between the observed and expected values, provide the needed statement of the null hypothesis. (c) Compute a Chi-square value associated with the appropriate test of significance. (d) How many degrees of freedom are associated with this test of significance?
Alternative forms of a gene (such as those responsible for eye color) are called
A) cyclins. B) alleles. C) receptors. D) sister chromatids. E) telomeres.
Cell walls can be found as part of:
A) bacterial cells. B) protists and animal cells. C) plant cells, bacteria, fungi, and protists. D) animal cells, fungi, and protists. E) plant cells.