A small island has stable populations of plants and animals, including one species of hawk but no other large predators. A ship docks at the island, and the sailors hunt and kill most of the hawks. What would you expect as an immediate consequence?
A. an increase in the rodents
B. an increase in the plants
C. an increase in the insects
D. a decrease in the plants
E. a decrease in the fish
Answer: A
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Male crickets create sounds that we call "chirps" by rubbing one wing against the other. If another male presents himself to the singing male, the two males will fight
First they interlock antenna, then they spread their jaws, and finally they wrestle. _____________ is/are examples of communication _______________. A. All of the actions; because all involve information being sent and received by the two crickets B. Interlocking antenna and spreading jaws; but not wrestling because communication is no longer needed when the two crickets are physically in contact C. Just the initial song and the response of the second male cricket arriving in the area; between the two crickets D. Just the initial song; because it is an intraspecific signal
If you were measuring hormones in the blood of a patient who was ovulating, you would expect a large increase in which hormone, reaching maximal level on the day of ovulation?
A. follicle-stimulating hormone (FSH) B. luteinizing hormone (LH) C. estrogen D. progesterone E. gonadotropin-releasing hormone (GnRH)
Amniocentesis is
a. a surgical means of repairing deformities. b. a form of chemotherapy that modifies or inhibits gene expression or the function of gene products. c. used in prenatal diagnosis to detect chromosomal mutations and metabolic disorders in embryos. d. a form of gene replacement therapy. e. all of these.
Name the two cycles in which bacteriophages act when they infect bacteria
What will be an ideal response?