Explain the evolutionary importance of seeds
What will be an ideal response?
Seeds enabled plants to thrive on land because the plant embryos are protected from drying out and survive on the food stored inside the seed until growing conditions are favorable. The seed coat helps regulate the timing of seed germination.
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The heart is a(n) ________ composed mainly of ________ tissue?
A. organ, connective B. tissue, connective C. organ, epithelial D. tissue, epithelial E. organ, muscle
The PCR method was developed by ________.
A. Sanger B. Cohen C. Mullis D. Boyer
The function of the DNA polymerase is to catalyze
A) the addition of deoxynucleotides. B) the formation of RNA primers. C) the addition of ribonucleotides. D) hydrogen bonding between complementary base pairs.
Tubular secretion occurs in the region labeled____
a. 1 only b. 2 only c. 3 d. 4 e. 1 and 2