Suppose that the allele for brown eyes (B) is dominant to the allele for hazel eyes (b). If both parents have brown eyes
and are heterozygous (Bb), what are the chances that their first child will have hazel eyes? Brown eyes? What are the
chances that if they have two children, both will have hazel eyes? What will be an ideal response?
Concepts to Consider: The probability that their first child will have hazel eyes is 1/4 (25%). The probability of both children having hazel eyes is 1/4 × 1/4 = 1/16.
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To see if a growth-promoting factor was released from blood platelets, cells called fibroblasts were placed in a dish containing liquid cell culture medium
The medium was supplemented with either serum (collected from blood that had been allowed to clot) or plasma from blood in which the platelets had not been activated during the clotting process. The number of cells in each culture is shown in the graph. Reference: Ref 9-2 How many cells are there on Day 3 in the culture that contains serum? A. 80,000 B. 800,000 C. 40,000 D. 400,000
The reactivated form of chickenpox is called ________.
A. herpes zoster B. rubella C. rubeola D. adenovirus
Cnidarians are
A. aquatic animals. B. Both land-dwelling animals and aquatic animals are correct. C. land-dwelling animals. D. arboreal animals. E. Both land-dwelling animals and arboreal animals are correct.
One difference between plants and animals is that plants are
A.) autotrophs and animals are heterotrophs B.) eukaryotic and animals are prokaryotic C.) prokaryotic and animals are eukaryotic D.) heterotrophs and animals are autotrophs