If a certain atom has a tendency to lose two electrons, that atom can then become a(n)
A) ion. B) polar molecule. C) isotope. D) water molecule.
A
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The letters G, Q, R, and C are used to describe bands that appear on chromosomes. The letters refer to
A. the position of the bands. B. the staining procedure used to reveal the bands. C. the size of the bands. D. the types of genes found within the bands. E. the relative importance of the bands in karyotyping.
Proliferation zone
What will be an ideal response?
Why are the trans-fatty acids common in fast foods a concern to nutritionists?
A) They increase the incidence of clogged arteries. B) They decrease the availability of iron to bodily cells. C) They cannot be digested by the human body. D) They outcompete the enzymes needed for normal bodily functions.
Endosperm has allowed the angiosperms to become the most numerous and diverse plant group. What is the role of the endosperm?
A) It provides nutrition for the developing embryo, therefore increasing survival rates. B) It is the hard outer seed coat that protects the embryo. C) It ejects and disperses seeds after they mature. D) It is the ripened ovary tissue involved in seed dispersal and protection. E) It is a type of male gamete.