Photosynthesis takes place in a specialized tissue of the leaf called
A. cuticle
B. mesophyll
C. stomata
D. petiole
Answer: B. mesophyll
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Which of the following statements is false?
A. The walls of the right ventricle are thicker than the walls of the left ventricle. B. Blood pressure in the pulmonary circulation is lower than blood pressure in the systemic circulation. C. The left ventricle pumps oxygenated blood, whereas the right ventricle pumps deoxygenated blood. D. The systemic blood pressure of a bird is much higher than that of a fish. E. None of the answer options is false.
Teratogens affect the ____ more than any other part of the fetal body
a. central nervous system b. upper limbs c. heart d. lower limbs e. external genitalia
A pine seed is composed primarily of
a. the embryo. b. female gametophyte. c. seed coats. d. the embryo and seed coats. e. the embryo, seed coats, and female gametophyte
The tough outer covering of the eye is referred to as the
A. sclera. B. iris. C. fovea. D. retina. E. pupil.