When a sperm penetrates an egg cell
A) the egg undergoes changes that attract another sperm.
B) sperm and egg chromosomes merge immediately.
C) the resulting cell is haploid.
D) the egg has to make a copy of itself before sperm and egg chromosomes merge.
E) the egg must undergo meiosis II before merging chromosomes with the sperm.
E
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Steve decides to make a meal for some of his friends. He uses a variety of foods to prepare the meal, including some canned mushrooms. Unfortunately, he gives his friends a mild case of botulism food poisoning
His friends report blurred vision and trouble speaking due to a flaccid paralysis of the muscle cells by the botulinum toxin. Propose a mechanism by which this toxin would inhibit muscle contraction.
The anticipated pleasure of a behaviour is called its:
(a) positive-incentive value (b) incentive salience (c) gratification value (d) behavioural salience
An organism made up of many highly specialized kinds of cells that coordinate their activities is a(n)
A. simple multicellular organism. B. aggregation. C. colonial organism. D. complex multicellular organism.
Glucocorticoids (i.e., cortisol, prednisolone, dexamethasone) have a diverse number of functions. They include glucose mobilization during stress, development of lung tissue, and therapies to reduce inflammation.
Answer the following statement true (T) or false (F)