At which gestational week does sexual differentiation begin in humans?
a. 5
b. 7
c. 10
d. 12
e. 14
ANSWER: b
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The accessory pigment phycoerythrin is dominant in the ________ group of algae, which mostly lack flagella, have multicellular lifestyles, and occur in marine waters
Those in particular which deposit calcium carbonate in coral reef systems are classified as ________ algae. A) chlorophyte / coralline B) chlorophyte / rhodolithic C) rhodophyte / coralline D) rhodophyte / rhodolithic
Which of the following represents the correct order of vertebrate gastrointestinal tract layers, going from outside the tract to inside the tract?
A. the serosa, submucosa, and the lumen B. the submucosa, the mucosa, the lumen, the plexuses, and the serosa C. the serosa, the mucosa, and the submucosa D. the serosa, submucosa, and the mucosa E. the mucosa, the plexuses, and the serosa
The human body requires about ____ of fat each day to stay healthy
a. 1 teaspoon b. 4 teaspoons c. 1 tablespoon d. 4 tablespoons e. 1 cup
Both echinoderms and chordates are deuterostomes. This means that
What will be an ideal response?