For mechanisms of sex determination, which of the following is incorrectly paired?

A. X-Y, cow
B. X-O, grasshopper
C. ZZ-ZW, bluebird
D. 1n-2n, pea plant
E. high temperature-low temperature, alligator


D. 1n-2n, pea plant

Biology & Microbiology

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The reduction in the density of chestnut trees in North America was due to

A. a fungal pathogen. B. chestnut blight. C. a fungal pathogen and chestnut blight. D. an insect. E. a bacteria.

Biology & Microbiology

Queen Victoria, a former monarch of England, was a carrier of which devastating X-linked recessive disorder that affected many of her male descendants?

a. galactosemia b. hemophilia A c. achondroplasia d. Huntington's disease

Biology & Microbiology

Which of the following types of interactions is advantageous for one species, but has no effect on the

other?

a. commensalism b. herbivory c. mutualism d. parasitism e. predation

Biology & Microbiology

What causes the AV (atrioventricular) valves within the heart to open during the cardiac cycle?

a. pressure generated by ventricular muscle contraction b. an action potential c. fluid pressure from the atria filling with blood d. a pacemaker signal e. arterial blood pressure

Biology & Microbiology