In plants, what are embolisms?
A) toxic acids produced when stomata are closed and it's sunny
B) formations of ice crystals when a plant is subjected to below-freezing temperatures
C) hormones that result in apical dominance
D) air bubbles that form within xylem
Answer: D) air bubbles that form within xylem
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Cartilage is composed of specialized cells called
A) osteoclasts. B) erythrocytes. C) chondrocytes. D) platelets. E) osteoblasts.
The primary function of a neuroglial cell is to ____.
A. keep neurons positioned correctly B. act as a sensory device to detect stimuli C. integrate information D. transmit signals to muscle cells E. facilitate cytoplasmic extensions
Which of the following groups of amphibians are legless and live under the leaves in the tropical rain forests?
a) Caecilians b) Frogs and Toads c) Salamanders d) Glass Snakes e) Cave Salamanders
When the placenta is delivered, what event allows secretion of prolactin and milk production?
A. Gradual drop in oxytocin B. Sudden rise in FSH and LH C. A surge of adrenaline and endorphins D. Sudden drop in progesterone and estradiol