A strand of DNA is composed of nucleotide bases, sulfate groups, and sugars.
Answer the following statement true (T) or false (F)
False
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Explain how the nonkinetochore microtubules lead to the elongation of the cell during anaphase
What will be an ideal response?
Sickle-cell anemia has been traced to what type of mutation?
a. frameshift b. transposable element c. mutagenic d. base-pair substitution e. viral
Which of the following is not a prezygotic isolating mechanism for two species found in the same geographical location?
A. The two species occupy different habitats. B. The two species are active during different parts of the day. C. The two species mate during different times of the year. D. The two species have incompatible genitalia. E. The two species can mate, but the offspring are sterile.
Which tissue can not divide to give rise to identical progeny in a plant that reproduces asexually?
A. root B. pollen grain C. stem D. leaf E. ovule