Gymnosperms lack which structure found in angiosperms?
a. independent gametophytes
b. pollen grains
c. fruits
d. roots
e. leaves
c
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Considering the types of side chains on amino acids and their relationship to protein structure, where are the amino acids with hydrophobic side chains most likely to be located?
What will be an ideal response?
Which distinguishes mitosis from meiosis?
A. Mitosis has one DNA replication, while meiosis has two DNA replications. B. In mitosis, one nuclear division occurs. In meiosis, two nuclear divisions occur. C. In mitosis, homologous chromosomes pair up. In meiosis, there is nopairing of chromosomes. D. Mitosis results in the production of gametes, while meiosis results inthe production of body cells.
When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Auxin absorbs mostly far-red light. B. Shade is enriched in far-red wavelengths of light. C. Phytochrome in the taller plant absorbs most of the red light. D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed. E. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll.
Infection of the ________ would be the hardest to treat with antimicrobial drugs
A) heart B) kidneys C) liver D) brain E) colon