Answer the following questions true (T) or false (F)
1. If a person has a recessive trait, the genotype must be homozygous recessive for the trait.
2. When two individuals with different traits are crossed, either the dominant or the recessive trait, and not an intermediate trait, is always seen, no matter what the organism or phenotype.
3. Women do not express X-linked recessive characters.
1. TRUE
2. FALSE
3. FALSE
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The major difference between the endosymbiotic relationship theory and the symbiotic relationship theory is
A. In the endosymbiotic relationship theory the archaeon engulfs the smaller bacterium while in the symbiotic relationship theory the Archaeon and Baterium unite, joining their plasma membranes. B. In the endosymbiotic relationship theory the archaeon and bacterium unite, joining their plasma membranes while in the symbiotic relationship theory the archaeon engulfs the smaller bacterium. C. In the endosymbiotic relationship theory the origin of both mitochondria and chloroplast are explained but the origin of the nucleus is not explained, while the symbiotic relationship theory explains the origin of mitochondria, chloroplast and the nucleus. D. In the symbiotic relationship theory the origin of both mitochondria and chloroplast are explained but the origin of the nucleus is not explained, while the endosymbiotic relationship theory explains the origin of mitochondria, chloroplast and the nucleus. E. Both theories have an explanation for the mitochondria and chloroplast, but the symbiotic theory fails to explain the origin of the nucleus.
Ovulation is triggered primarily by:
a. a surge of LH b. the falling levels of estrogen c. the rising levels of progesterone d. the corpus luteum formation e. the completion of meiosis II
How do we know that the atmosphere of the earth experienced an increase in O2 and became oxidizing between 2.5 and 2 billion years ago?
What will be an ideal response?
You are working on a project that involves the direct observation of DNA molecules. The microscope that would give you the best information at this time would be the
A) light microscope. B) phase-contrast microscope. C) transmission electron microscope. D) digital video microscope. E) fluorescent microscope.