Which of the following is not normally a component of a ribonucleotide?
A. a phosphate group
B. a ribose
C. uracil
D. thymine
E. adenine
D
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An ecologist recorded twelve white-tailed deer, Odocoileus virginianus, per square kilometer in one woodlot and twenty per square kilometer in another woodlot. What was the ecologist comparing?
A) density B) dispersion C) carrying capacity D) cohorts E) range
Are all fungi detrimental (bad) for other organisms?
A. Yes-think of molds that destroy plant crops, or fungal infections that cause athlete's foot. All fungi are bad for organisms they colonize. B. Yes-fungi feed directly on organic material (oftentimes killing it or feeding on it after the original organism has died). As such, they are always bad for other organisms. C. No-fungi are sometimes good, sometimes bad for other organisms. It really depends on which fungus you're talking about and the relationship it has with the other organism. Some fungi, for example, can form a symbiotic relationship with plant roots that increases their nutrient and water absorption. This is good. D. No-fungi are ALWAYS good when they interact with other organisms. There's never a downside or negative aspect to such interactions. Both sides always benefit from the relationship.
There are about ____ identified species of vertebrates
a. 2,000 b. 5,000 c. 30,000 d. 50,000 e. 125,000
Post-translational modifications of proteins may include the _____
A) removal of introns B) addition of a 5' cap C) addition of a poly-A tail D) addition of carbohydrates to form a glycoprotein