Which of the following applications of biotechnology results in an insect-resistant plant?
A) Banana-based vaccine against pathogenic Escherichia coli
B) Insulin production by bacteria
C) Bt toxin production by soybeans
D) Growth-hormone-treated cows
E) Herbicide-resistant corn
C
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Sympatric speciation differs from allopatric speciation because with sympatric speciation
A. a population becomes geographically isolated. B. two populations of the same species merge to form a single population. C. polyploidy (changes in the number of sets of chromosomes) arises. D. hybrid zones form. E. temporal factors may arise without geographic isolation occurring and polyploidy may arise.
The significance of the Griffith, Avery, and Hershey-Chase experiments was that they demonstrated that
A. genes were located on chromosomes. B. DNA was the molecule of heredity. C. proteins were what genes were composed of. D. enzymes transformed bacteria.
When a honey bee scout returns to the hive, it will perform a round dance to indicate that the nectar is close, while the
waggle dance indicates the nectar is distant to the hive. This dance is an example of: a. sign stimuli linked to social interaction. b. migratory behavior stimulated by environmental changes. c. insight learning based on trial and error. d. a physiologically meaningful stimulus (food) and an irrelevant stimulus (dance). e. optimal foraging dependent on cooperative social behavior.
Cancer patients who receive radiation treatment or chemotherapy often slough off their most rapidly dividing body cells, such as those in the hair follicles and those lining the gastrointestinal tract
This results in much of the pain, fatigue, and other complications associated with the cancer treatment. Understandably, some loss of hair is expected when undergoing such procedures. Which of the following would you also expect to occur with cancer treatment? A) Elevated lipid and glucose levels in the blood B) Constipation due to excessive water reabsorption C) High blood pressure D) Excess mucus production in the airways E) Reduced nutrient absorption and subsequent weakness