Northern elephant seals (Mirounga angustirostris) come up on a beach during breeding season. Males arrive first and establish a territory by posturing and fighting with other males. The posturing and fighting behaviors are probably the result of _________
A. intrasexual selection
B. intersexual selection
C. competition
D. kin selection
E. group selection
A
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A karyotype is a technique by which a researcher can see and count chromosomes
A. true B. false
Nuclear transfer is a preferred method of cloning over embryo splitting because it ____
a. is less technical b. is more natural c. results in a larger number of cloned offspring d. produces both male and female offspring from the same clone e. uses haploid nuclei
The uterine cycle is also called the ovarian cycle
Indicate whether the statement is true or false.
Which of the following is NOT one of the American Cancer Society’s warning signs?
a. change in bowel and bladder habits b. changes in appetite c. sores that don’t hea d. nagging cough e. unusual bleeding