Which of the following structure of a eukaryotic cell is not likely derived from endosymbiotic bacterium?
A. mitochondria DNA
B. mitochondria ribosomes
C. inner membrane
D. outer membrane
Ans: D. outer membrane
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One unique feature of fertilization in flowering plants compared with animals is that _____
A) only plant sperm are motile B) fertilization in flowering plants involves double fertilization C) fertilization in flowering plants does not involve nuclear fusion D) in flowering plants the gametes are diploid, not haploid as they are in animals
If a trait is controlled by two codominant alleles of one gene, what phenotypic ratio is expected in the offspring of a mating of two heterozygotes?
A) 2:1 B) 3:1 C) 1:2:1 D) 1:1 E) 4:1
Removal of which of the following lymphoid organs would be most detrimental to immune function in an infant?
What will be an ideal response?
When a rabbit eats a bean plant, a portion of the available energy moves into the rabbit's body. When the rabbit is eaten by a hawk, a portion of the available energy moves into the hawk's body. Indicate the various areas that energy is used by an organism, and why only 10% of the rabbit's available energy will move to the hawk.
What will be an ideal response?