An animal with a ladder-like nervous system is the

A. earthworm.
B. hydra.
C. planarian.
D. cat.
E. octopus.


Answer: C

Biology & Microbiology

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Which of the following is/are not true about viral envelopes?

A. The envelope lipids and carbohydrates are derived from the host. B. The envelope proteins are virus specific and the envelope lipids and carbohydrates are derived from the host. C. They are typical lipid monolayers with embedded viral proteins. D. The envelope proteins are virus specific.

Biology & Microbiology

Match the type of work with the example of that type of work.

A) accumulation of substances in a cell B) maintaining body temperature C) muscle contraction D) nerve impulse conduction E) luminous toadstools F) carbon fixation 1) synthetic work 2) mechanical work 3) concentration work 4) electrical work 5) heat 6) bioluminescence

Biology & Microbiology

The uneven distribution of an impermeable solute on either side of a membrane will result in  

A.  an increase in oxygen deprivation. B.  proton pumping. C.  root pressure. D.  osmosis. E.  stomatal closing.

Biology & Microbiology

Addison's disease is a disorder that results from a reduction in production of glucocorticoids and mineralocorticoids. Individuals with Addison's disease suffer from a variety of systemic symptoms including: muscle weakness, fever, issues with the gastrointestinal tract, and increased tanning. Considering this information, what type of signaling do you think that glucocorticoids and mineralocorticoids stimulate?

A. Synaptic B. Endocrine C. Paracrine D. Direct contact E. Autocrine

Biology & Microbiology