Economies of scale occur in major transitions when:
a. individuals aggregate.
b. groups can perform tasks more efficiently than individuals.
c. cell type number increases.
d. genes become genetically imprinted.
B
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What is the approximate number of distinct evolutionary branches in the domain Archaea, as revealed by genome sequencing studies?
a. 3 to 4 b. 9 to 10 c. at least 12 d. at least 20
When the two gametes that fuse to form a zygote contain different alleles of a given gene, the offspring is
A) abnormal. B) heterozygous. C) a new species. D) homozygous. E) haploid.
Which agent can cause an infection that can ultimately develop into pelvic inflammatory disease in women?
A) herpes simplex virus type 2 B) papilloma virus C) Candida D) Chlamydia
The dominant stage in the life cycle of tracheophyte plants is the
A. angiosperm generation. B. sporophyte generation. C. spore generation. D. epiphyte generation. E. gametophyte generation.