Adequate intake of __________ by a mother-to-be
before and during early pregnancy may reduce the
risk of spina bifida and other serious neural tube
defects.
a. carbohydrates
b. folic acid
c. calcium
d. vitamin C
e. sodium
Answer: b
You might also like to view...
A seed that lands in the forest soil is homozygous mutant for the CONSTANS (CO) gene, and as a result does not produce any functional CONSTANS protein. What do you predict will happen during the development of this seed?
A. It will germinate and grow vegetatively, but will never produce flowers. B. It will fail to germinate. C. It will germinate and grow vegetatively, and then it will produce flowers earlier than wildtype. D. It will germinate and grow vegetatively. If it is from a photoperiodic species, it will fail to produce flowers. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the CONSTANS gene? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Elastin molecules are crosslinked to each other by
A) hydrogen bonds between hydroxylysines and hydroxyprolines. B) covalent bonds between lysines. C) covalent bonds between prolines. D) hydrophobic interactions between hydroxyprolines and glycines. E) peptide bonds between glycines.
The human life cycle consists of
a. adults who are haploid and produce diploid gametes, these gametes fuse to produce a haploid zygote which grows into an adult. b. adults who are diploid and produce haploid gametes, these gametes fuse to produce a diploid zygote which grows into an adult. c. zygotes who are haploid fuse to produce a diploid gamete which grows into an adult. d. gametes that are diploid and produce haploid zygotes, these grow into haploid adults.
Which of the following is generally accepted as the origin of living organisms?
a. Life was seeded on Earth from some distant place by meteorites and comets crashing into Earth. b. Spontaneous generation c. Life originated from an oxygen-rich atmosphere on Earth. d. Life can originate from nonliving matter. e. Prebiotic chemical evolution gave rise to progressively more complex molecules and eventually to living organisms