What would be a typical phenotypic monohybrid ratio in which a lethal allele is involved?
A) 9:3:3:1 B) 2:1 C) 3:1 D) 6:2:3:1 E) 13:5
Answer: B
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Why do oils form a significant part of the nutritional reserves in many seeds?
A. Oils store twice as much energy as an equivalent mass of starch. B. Oils help keep the embryo hydrated, allowing the seed to survive in dry habitats. C. Hormones diffuse more quickly through oils. D. The oils reduce the density of the seed and allow for water dispersal. E. Oils contain more mineral nutrients than carbohydrates.
Why is Graves’ disease dangerous? What will be an ideal response?
In a complete chemical analysis of double-stranded DNA, which would always be true?
A. The amount of adenine equals the amount of thymine. B. The amount of thymine equals the amount of cytosine. C. The amount of ribose equals the amount of deoxyribose. D. Nitrogenous bases pair with sugar.
The _________ pathway of apoptosis is one in which external stimuli activate apoptosis via a signaling pathway.
a) integral b) peripheral c) extrinsic d) external e) intrinsic