Two dihybrid pea plants (both tall and with purple flowers) are mated. The cross resulted in 9866 progeny, of which 5550 were tall with purple flowers. What are the expected ratios of the other phenotypic classes?
A. 1850 Short/white flower 616 Tall/white flower 1850 Short/purple flower
B. 1850 Short/white flower 1850 Tall/white flower 1850 Short/purple flower
C. 616 Short/white flower 1850 Tall/white flower 1850 Short/purple flower
D. 5550 Short/white flower 5550 Tall/white flower 5550 Short/purple flower
C
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The assignment of names to taxonomic groups is referred to as ________.
A. nomenclature B. systematics C. identification D. taxonomy
The role of the agar ingredient in culture medium is to:
a. provide a nutritional base for bacterial metabolism. b. solidify the medium and provide a stable culture surface. c. sterilize the medium and prevent conta-mination. d. support the growth of only pathogenic or-ganisms.
What is the current rate of species extinction?
a. 500xs faster than normal b. 20xs faster than normal c. 100xs faster than normal d. 10xs faster than normal e. 1000xs faster than normal
All of the following are general characteristics of all animals except
a. diploid with haploid eggs and sperm. b. develop from an embryo. c. multicellular body. d. heterotrophic. e. possesion of nerves and muscles.