Chemoreceptors for blood pH are located in the brain stem and the lungs.
Answer the following statement true (T) or false (F)
False
Chemoreceptors for blood pH are located in the brain stem, the carotid arteries, and the aorta.
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The protective outer covering of a seed is called the ____
Fill in the blank with the appropriate word.
A biologist discovers a new species of organism adapted to living in a deep underground cavern that provides no source of free water. The organism is eyeless and covered by fur, and it has a four chambered heart with a closed circulatory system. What excretory system adaptations to this extreme environment might the biologist expect to find?
A. Very long malpighian tubules B. Very short malpighian tubules C. Metanephridia with a large number of nephridiopores D. Nephrons with long loops of Henle E. Nephrons with short loops of Henle
Which of the following is a junction between two
neurons? a. Schwann cell b. chemical synapse c. unsheathed node d. sodium gate e. all of these
The state of having more than two sets of chromosomes is called:
A) dominant. B) polyploidy. C) autosomal. D) nondisjunction. E) aneuploidy.