If blood clotting doesn't occur correctly, what could happen?
A. Fluid would accumulate in the body.
B. Formed elements and plasma would not remain in the blood.
C. The blood pressure of the individuals would increase.
D. Red blood cells would increase in concentration.
E. The Ca2+ concentration in the blood would increase.
Answer: B
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Which statement is not true of the imperfect fungi?
(a) They reproduce sexually by means of conidia. (b) They form an ascocarp. (c) Sex organs are present in the form of oogonia and antheridia. (d) All of the above are false.
A scientist found an unweathered igneous rock that contained 0.025 g of potassium-40 and 0.075 g of argon-40. The half-life of potassium-40 is 1.3 billion years. Using the table from figure 22.8 the age of the rock would be estimated to be
A. 2.6 billion years old.
B. 0.050 billion years old.
C. 1.3 billion years old.
D. 0.001875 billion years old.
E. 1.69 billion years old.
How can the preservation of biological diversity be justified? Check all that apply.
_____ ethical grounds. _____ supernatural responsibility. _____ economic value. _____ ecological value. _____ exploitative value.
In sickle cell anemia, affected individuals carry ____
a. one of several different nucleotide substitutions b. the same single nucleotide substitution c. more than one nucleotide substitution
d. a number of mutant alleles e. one mutant allele in several genes