Which group underwent a large increase in diversity during the Cambrian explosion?

A) animals
B) plants
C) fungi
D) bacteria


A

Biology & Microbiology

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Assortative and disassortative mating are similar in that both ____ 

A. are kinds of selection pressure. B. change only the expected Hardy-Weinberg genotype frequencies in a population. C. are examples of random mating. D. change only the expected Hardy-Weinberg allele frequencies in a population. E. change both the expected Hardy-Weinberg allele and genotype frequencies in a population.

Biology & Microbiology

Which of the following has shown positive results in limiting population growth?

a. family planning education programs b. international one-child policies c. economic development incentives d. changes in living standards

Biology & Microbiology

Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component?

A) RNA ? DNA ? RNA ? protein B) DNA ? RNA ? protein C) protein ? RNA ? DNA D) DNA ? tRNA ? mRNA ? protein

Biology & Microbiology

Select all of the following that are true about cephalopods.

_____ They may be very large and can weigh over 1000 pounds. _____ They are very intelligent and are capable of learning by observation. _____ They lack a shell. _____ They are exclusively herbivorous. _____ They have a closed circulatory system

Biology & Microbiology