All vertebrates have ________
A) hair and a backbone
B) a skull and a backbone
C) four limbs and a backbone
D) scales and a backbone
B
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Answer the following statements true (T) or false (F)
1. Protists are only capable of asexual reproduction. 2. DNA analysis shows that fungi are more genetically related to plants than animals. 3. As plants evolved to grow taller, their stems had to become more rigid. 4. Plants exhibit a final body form, like animals, which they keep until they die. 5. All fruits are derived from the ovary of an angiosperm.
Among these choices, what is the most reliable form of birth control?
A. Condoms B. Abstinence C. Birth control pills D. Depo shots
Within the fluid mosaic of a plasma membrane, what is the role of transport and channel proteins?
A) They identify the cell. B) They may set off cellular changes such as cell division or hormone secretion. C) They prevent the passage of amino acids. D) They are cell-surface connection sites. E) They permit ions and water molecules to move through the plasma membrane.
What are the DNA repair functions and the modes of activity of glycosylases and methyltransferases?
What will be an ideal response?