Which of the following classes of microtubules is attached to chromosomes?
a. Astral microtubules
b. Interphase microtubules
c. Kinetochore microtubules
d. Polar microtubules
Ans: c. Kinetochore microtubules
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During glycolysis, glucose molecules are broken down by breaking the carbon-hydrogen bonds that
are present and forming carbon-oxygen bonds. What is this chemical phenomena called?
a. oxidation b. reduction c. protonation d. electrolysis e. pyruvate reduction
What is the formation of two species from one original species called?
a. natural selection b. evolution c. speciation d. divergence
The bark from _______ tree species was the original source of salicylic acid, the pain-relieving substance in aspirin.
A. Willow B. Cinchona C. Kola D. Maple E. Yew
An organism that uses methane or methanol as its sole carbon and energy source is called a ________.
A. methanogen B. methylotroph C. methylogen D. methanotroph