While running in a garden, a girl steps on an old board and a nail goes through her shoe and skin,
causing a deep puncture wound. Which of the following non-specific defense mechanisms will aid in
defense from pathogens?
a. epithelial cells with cilia
b. lysozyme
c. acidic skin secretions
d. inflammation
e. natural killer cells
D
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When X-linked traits are recessive, females will express the traits only if they are ____ for the recessive allele
Fill in the blank with the appropriate word.
A plant will begin flowering in response to changes in length of daylight, temperature, and light quality. This is an example of which unifying principle of life?
A. Plants conduct photosynthesis. B. Living organisms maintain homeostasis. C. Living organisms interact with their environment. D. Living organisms grow and develop. E. Populations of organisms evolve from one generation to the next.
Which of the following is not a reason for the importance of mRNA processing in eukaryotes?
A) longevity in the cytoplasm B) coupling of transcription and translation C) presence of a nuclear membrane D) turnover in the cytoplasm E) removal of introns
The major function of the protonephridia in the flatworm is to:
a. conserve water. b. conserve salts. c. eliminate waste materials such as ammonia and urea. d. eliminate excess water. e. regulate the pH of the gastrovascular cavity.