Birds that aggregate in larger leks are generally _____ at attracting females and achieve _____ successful copulations.
Fill in the blank(s) with the appropriate word(s).
Answer: more successful; more
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Given the diagram below, assume that a G1 chromosome (left) underwent one round of replication in 3H-thymidine and the metaphase chromosome (right) had both chromatids labeled
Which of the following replicative models (conservative, dispersive, semiconservative) could be eliminated by this observation?
Answer the following questions in reference to the five items listed below.
A. B. The normal sperm cell of species X carries 11 chromosomes. Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova, some of the zygotes will have 21 chromosomes, and the remainder will have how many chromosomes? C. How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose diploid complement of chromosomes is 48? D. Following a gene duplication event involving only five loci, how many chromosomes will a human female have? E. How many chromosomes does each somatic cell have in a human male who has two X chromosomes? F. How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)?
The field of ________ focuses on the ultimate cause of animal behavior in natural conditions.
Fill in the blank(s) with the appropriate word(s).
Every exercise prescription must include at least one mode of exercise.
a. true b. false