Hypothyroidism during infancy and childhood can lead to a condition of retarded mental and physical developmentcalled:a

dwarfism.
b. gigantism.
c. acromegaly.
d. myxedema.
e. cretinism


e

Biology & Microbiology

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Answer the following statements true (T) or false (F)

1. You could observe saltatory conduction in a crayfish. 2. The exposed, unmyelinated gaps between glia on myelinated axons are also sites of voltage-gated Na+ channels. 3. Electrical synapses transmit signals using neurotransmitters. 4. A given neurotransmitter can produce either excitatory or inhibitory effects on postsynaptic neurons depending on the specific receptor type it binds.

Biology & Microbiology

All of the following are examples of different types of microbiological media except ________.

A. enriched B. broth C. semisolid D. Petri dish E. agar

Biology & Microbiology

Why must the information in a species's DNA be changeable?

What will be an ideal response?

Biology & Microbiology

Imagine that you are an archaeologist on a dig somewhere on an East Asian island and than you begin to excavate an area littered with stone tools that also has the remains of an ancient fire. Subsequent carbon dating of the charcoal from the fire yields

a date of 100,000 years before the present. Given these circumstances, which species would you expect most likely set that fire? A) Homo ergaster B) Australopithecus afarensis C) Homo erectus D) Ardipithecus ramidus

Biology & Microbiology