Which of the following animals do not have a four-chambered heart with two separate pumping systems?

A. hummingbirds
B. lizards
C. cats
D. crocodiles
E. elephants


Answer: B

Biology & Microbiology

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Match the following items to the correct phrase.

_______1. Facultative anaerobes. _______2. Microaerophiles. _______3. Some species are aerotolerant anaerobes and some species are obligate anaerobes. _______4. Fastidious bacterial pathogens that will grow on chocolate agar but not on blood agar. _______5. Capnophiles. _______6. Acid-fast bacteria. a. Neisseria gonorrhoeae and Campylobacter spp. b. Clostridium spp. c. E. coli, most Staphylococcus and Streptococcus spp. d. Mycobacterium and Nocardia spp. e. Neisseria gonorrhoeae and Haemophilus influenzae

Biology & Microbiology

Which of the following anatomical sites being tested or are targets for future gene therapies?

Biology & Microbiology

Shawfiq must have a benign tumor removed from his brain. The surgeon tells him that only local anesthesia will be administered as she cuts through Shawfiq's scalp and that he will remain conscious the whole time

Shawfiq is really nervous about this because the brain seems to be a very sensitive area to have surgery on, particularly while he is wide awake. Explain to him why he shouldn't be so nervous.

Biology & Microbiology

Which of the following illustrates altruism?

A) Parent birds spend much of their time and energy feeding their young. B) A mother bird pretends to be wounded to distract a predator away from her young. C) Males sing to attract females as mating partners. D) Birds of a different species care for a cuckoo egg. E) Parent birds clean out their nests.

Biology & Microbiology