Which of the following should prevent a grass seedling shoot from bending toward light?
a. removing the shoot tip
b. placing a translucent cap on the shoot tip
c. placing an opaque cap on the shoot tip
d. either removing the shoot tip or placing a translucent cap on the shoot tip
e. either removing the shoot tip or placing an opaque cap on the shoot tip
E
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The cytoskeleton of animal cells includes:
A. microtubules, microfilaments, and intermediate filaments. B. actin, microfilaments, and intermediate filaments. C. actin, microtubules, intermediate filaments. D. tubulin, microfilaments, and intermediate filaments. E. microtubules and microfilaments.
Carotenoids are accessory pigments that ____
a. absorb yellow and red light to assist in photosynthesis b. capture energy from light and use it directly in cellular respiration c. are masked by the presence of chlorophyll throughout the growing season d. absorb blue and violet wavelengths and reflect green and yellow e. reflect blue wavelengths
peritonitis
What will be an ideal response?
Barry Marshall and his collaborators showed that
A) lifestyle factors such as stress, diet, and smoking cause chronic gastritis and stomach ulcers. B) lab animals are easily infected by Helicobacter pylori. C) Helicobacter pylori bacteria are protective against peptic ulcers. D) Helicobacter pylori bacteria cause chronic gastritis and stomach ulcers.