Scuba divers use a BCD to control buoyancy. It is essentially a bag that can be inflated or deflated to prevent excessive sinking or floating. How do bony fish accomplish this?

A. They adjust the level of gasses in their swim bladder.
B. They swim rapidly to saturate the blood with oxygen.
C. They adjust their position using the pectoral and pelvic fins.
D. They pump their operculum.


Answer: A

Biology & Microbiology

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Biology & Microbiology

You are scheduled to give a seminar to your fellow med school students, and have chosen to speak about the pituitary. What important points will you include? (Check all that apply.) 

_____ The posterior pituitary is derived from the brain, while the anterior pituitary is not. _____ The anterior pituitary is derived from the brain, while the posterior pituitary is not. _____ The pituitary is a compound endocrine gland. _____ Each half of the pituitary secretes one important hormone. _____ Some pituitary hormones have sex-specific effects. _____ If there is too little iodine in the diet, the pituitary can grow into a goiter. _____ The pituitary is responsible for producing at least nine major hormones.

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Mendel referred to the expressed trait in the F1 generation as _____. The unexpressed trait in the F1 generation was referred to as _____. For example, the purple flowering trait is dominant and the white flowering trait is recessive.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

______ are individuals who inconspicuously shelter a pathogen and spread it to others.

A) Vectors B) Sources C) Opportunists D) Carriers

Biology & Microbiology