__________, such as jellyfishes, corals, and sea anemones, are radially symmetrical. Fill in the blank(s) with the appropriate word(s)
Cnidarians
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Regarding soil and organic matter in humus, which of the following statements is true?
A) Humus is composed of inorganic nutrients, and organic matter is composed only of organic matter. B) Soil organic matter is completely decayed. C) Completely decayed soil organic matter is called humus. D) Eventually, the nutrients in soil organic matter are converted to organic form.
Which of the following observations suggested that blending was, at best, an incomplete explanation for inheritance?
a. all of the choices b. parents without freckles have children with freckles c. a mating between a white and black horse rarely produced gray offspring d. a cross between white-flowered and purple-flowered pea plants never produced lavender-flowered offspring
Which of the following hormones is produced only when a woman is pregnant?
a. testosterone b. gonadotropic-releasing hormone c. human chorionic gonadotropin d. estrogen e. progesterone
Chemical bond is formed by sharing of electrons:
a. covalent bond b. peptide bond c. atom