How many homologous pairs of chromosomes are found in a human somatic cell nucleus?
What will be an ideal response?
23
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Chemotherapy drugs make patients nauseous because they
A) cause fever, which can trigger nausea. B) interfere with the brain's interpretation of sensory input. C) stimulate stomach acid production. D) attack rapidly dividing cells, including those lining the digestive tract.
An X-linked recessive gene (c) produces red-green color blindness. A normal woman whose father was color blind marries a color-blind man. What are the chances that the first son will be color blind?
A. 0% B. 25% C. 50% D. 75% E. 100%
Which layer of the skin lacks connective tissue?
A) epidermis B) dermis C) hypodermis D) hair
If a cross section of a eudicot herbaceous stem were compared with the cross section of its root, how would they differ?
A. location of vascular tissue B. location of terminal buds C. location of dermal tissue D. location of ground tissue