The metal, ________, is central in chlorophyll molecules
a. Fe
b. Mg
c. Mn
d. Zn
Answer: B
You might also like to view...
What organism accounts for a major proportion of the ocean's organic matter and oxygen production?
a. Chemosynthetic bacteria b. Obligate anaerobes c. Cyanobacteria d. Plycoerythrin
Within the typical sexual reproduction of green algae, the genetic composition of the sporophyte form of the protist is
A. limited to the DNA found within the chloroplasts, because the sporophyte is a dormant form of the protist. B. 1n, or haploid, because the sporophyte follows meiosis. C. 2n, or diploid, because the sporophyte follows fertilization, growing and differentiating through numerous cell cycles. D. None of the answer choices is correct. E. reproduced through mitosis, after the zygote single cell has formed.
Root structures that grow around and encapsulate mutualistic nitrogen-fixing bacteria are called ____.
A. hyphae B. mycorrhizae C. Casparian strip D. root hairs E. root nodules
The two scientists credited with the formulation of the cell theory (cell doctrine) from the 1800s are
A. Watson and Crick. B. Schleiden and Hooke. C. Schleiden and Schwann. D. Ben and Jerry. E. Schwann and Jenner.