__________ covers and protects the outer surfaces of
primary plant parts. Fill in the blank(s) with the appropriate word(s).
Answer: Epidermis
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Which of the following is not true of combinatorial control of the yeast mating-type?
A. Mcm1 and ?1 combine to activate ?-specific genes in haploid ? cells. B. Mcm1 and a1 combine to repress ?-specific genes in haploid a cells. C. Mcm1 and ?2 combine to repress a-specific genes in haploid ? cells. D. Mcm1 and ?2 combine to repress a-specific genes in diploid cells.
Generalized anaphylaxis may be quickly controlled with the use of antihistamines
Indicate whether this statement is true or false.
It has been known for some time that fetal cells can be found in a pregnant woman’s bloodstream,
sometimes years after a pregnancy. A new technique has been developed that allows scientists to isolate these fetal cells from a pregnant woman’s blood. Why would this be a useful new tool for parents interested in genetic testing of their fetus?
What will be an ideal response?Which of the following statements is false?
A) When an allele is dominant, the heterozygous combination is the same phenotypically as one of the homozygotes. B) Epistasis would not be expected to occur in a biochemical pathway. C) Dominance refers to the form of expression of a gene in relation to its allele (or alleles). D) Epistasis refers to a gene (or genes) of one pair masking the expression of a gene (or genes) at a different locus. E) Epistasis is a nonallelic interaction; dominance is an allelic interaction.