Which of the following is necessary before any of the other events can occur?
A. independent assortment
B. segregation
C. haploid cells
D. pairing of homologous chromosomes
D. pairing of homologous chromosomes
You might also like to view...
Agglutination by the anti-A and anti-B antibodies will be expressed as the blood type ________. a. None of these choices
b. B c. AB d. A e. O
Antimicrobials that inhibit DNA and RNA synthesis are toxic to those taking them, so liver functions should be monitored on a regular basis for the time during which the patient is taking the drug.
a. true b. false
Which of the following is a successful piece of environmental legislation enacted by the Congress of the United States?
A) Clean Air Act (1970) B) Clean Water Act (1972) C) Endangered Species Act (1973) D) all of the above
Lepidopterans (moths and butterflies) sometimes have specialized flying behaviors. Some moths have the ability to do sudden vertical drops when they detect bat sonar, to avoid being eaten. Other species use special flying techniques to attract a mate.When biologists talk about the "cause" of a behavior, they may be referring to two different things. The proximate cause is the sequence of physiological events that lead to the behavior in an individual. The ultimate cause is the adaptive benefit to the animal that allowed natural selection to sculpt the behavior over evolutionary time. Understanding both the proximate and ultimate basis of behavior is important, and different types of biologists may focus on each.A moth species is known for its unusual flying behavior, which includes
sudden vertical drops and horizontal zigzags. Not much is known about the cause of this behavior. What could you study to better understand the proximate basis of this behavior? (Check all that apply.)A) Brain structureB) Flying behavior in related speciesC) HormonesD) Mating behaviorE) PhysiologyF) PredationG) Sensory organsH) Wing muscle development What will be an ideal response?