Hemophilia is a sex-linked recessive trait in humans. If a carrier female (heterozygous for the trait) mated with a normal male, what would be the expected outcome(s)?
A. None of the offspring would have
hemophilia.
B. None of the daughters would have
hemophilia.
C. Half the daughters would have hemophilia.
D. Half the sons would have hemophilia.
E. None of the daughters would have
hemophilia, and half of the sons would have
hemophilia.
E
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Four of the five answers listed below are protistan structures. Select the exception
a. cell membrane b. pili c. mitochondrion d. eyespot e. pellicle
Slime molds were once classified as fungi. What characteristics of the slime molds distinguish them from fungi?
A. The vegetative state of the slime mold is mobile and amoeboid. B. They are flagellated cells at certain stages of the life cycle. C. Slime molds lack cell walls. D. All of these characteristics distinguish slime molds from fungi.
In the cricket lab, we investigated the effect on territoriality on aggression. Which of the following is correct and can be included in the Discussion section of your paper?
A. The data proves that territoriality has an affect on aggression of male house crickets. B. This experiment can be improved by adding a female into the artificial environment to test if male house crickets fight for courtship advantages, a behavior that has been seen in field crickets (Alexander 162). C. A Chi-squared test was run and the p value was 0.022. Since this is below the significance level of 0.05, the null hypothesis can be rejected. D. All animal subjects were maintained in a very artificial environment and this could account for the decreased levels in territoriality and aggression.
Which statement best describes the relationship between a tissue and an organ system?
A) The tissue level of organization is more inclusive than the organ system level. B) Tissues are not composed of cells; organ systems are composed of cells. C) A tissue cannot exist unless it is a component of an organ system, whereas an organ system can exist independently of tissues. D) An organ system includes tissues.