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BIO 1102 midterm
Terms in this set (5)
A student is describing the tissue that makes up the walls of the alveoli in the lungs. It appears that these walls are composed of flattened cells arranged in a single layer to facilitate gas exchange. Which one of the following terms best describes this tissue?
In which of the following ways to prokaryotic cells and eukaryotic cells differ?
Prokaryotic cells lack a membrane-bound nucleus and other membranous organelles.
A concentration gradient:
is a source of potential energy
DNA contains the instructions for the assembly of:
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Find two positive integers such that the sum of the first number and four times the second number is 1000 and the product of the numbers is as large as possible.
Ultraviolet rays from the sun can cause sunburn. Sunscreens have been advertised as effective protection against sunburns. Design an experiment to determine whether the advertising claims are accurate.
An unknown element, X, combines with aluminum to form a compound with the empirical formula $$ Al_2X_3 $$ What would be the most likely formula for the compound that element X forms with calcium, Ca? Explain your answer.
(a) What is crossing over? (b) How does crossing over increase the variation in the gametes (and hence the offspring)?