Each unduplicated chromosome consists of two DNA molecule(s)
__________________ Indicate whether the statement is true or false.
F, one
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A carrier of an X-linked recessive trait who expresses the phenotype is called a(n)
A) manifesting homozygote. B) manifesting mutant. C) manifesting heterozygote. D) imprinting heterozygote.
External fertilization is most common in animals living in ____
a. mountains b. prairies c. forests d. oceans e. deserts
Which of the following is a likely explanation of why natural selection favored the evolution of signals for sexual reproduction?
A) Even in the simplest organisms, sexual reproduction required several coordinated responses by cells. B) Multicellular eukaryotes required signals that were responded to by multiple organ systems. C) Cells of several kinds of mating types needed to sort themselves to allow self-recognition. D) Rooted plants required chemical diffusible signals that could travel throughout the organism. E) Hormones required a mechanism for introducing changes in their target tissues.
What are the high energy phosphates?
What will be an ideal response?