Many algal species have life cycles consisting of alternating haploid and diploid generations. The most common life
cycle in brown algae consists of organisms that are ____.
a. unicellular in the haploid stage and multicellular in the diploid stage
b. multicellular in the haploid stage and unicellular in the diploid stage
c. unicellular in both the haploid and diploid stages
d. multicellular in both the haploid and diploid stages
e. colonial in both the haploid and diploid stages
ANSWER: d
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In an inherited form of high cholesterol, rr individuals have a blood cholesterol level greater than 500 mg/dL, Rr individuals are near 300 mg/dL, while normal (RR) cholesterol levels should be less than 200 mg/dL. The R allele is to the r allele.
A. codominant B. recessive C. homozygous D. dominant E. incompletely dominant
A substance that is resistant to changes in pH is called a buffer
__________________ Indicate whether the statement is true or false.
Three organs in the human body are involved in the production of vitamin D; they are the ________, ________, and ________
Fill in the blank(s) with correct word
Based on the accompanying figure, which of the following is not a response to a decrease in body temperature?
a. the release of thyroid hormone b. the contraction of blood vessels c. an increase in metabolic rate d. an increase in voluntary movement e. evaporation of water