For some human traits, two possible alleles exist. For other traits, multiple (more than two) alleles for the trait are present in the population. Which of the following is an example of a trait controlled by multiple alleles?
A) albinism
B) blood type
C) hemophilia
D) color blindness
Ans: B) blood type
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Although freshwater biomes cover less than 1% of the Earth's surface, they are important because ________.
A. they are home to lots of species B. we depend on them for drinking water C. they are the source of our irrigation for agriculture D. All of the above are reasons why freshwater biomes are important.
A mutation causes a gene to become overactive, contributing to uncontrolled cell growth. Which term best describes this gene?
A. tumor-suppressor gene B. oncogene C. spliced gene D. alternatively spliced gene E. malignant gene
Covalent modification of enzymes most commonly uses phosphoryl, methyl, and adenyl groups.
Answer the following statement true (T) or false (F)
Which hormone causes calcium to be released from bone into the bloodstream?
A) Boniva B) estrogen C) calcitonin D) parathyroid hormone (PTH)