Being a heterotroph means ________.
A. making your own food from oxygen
B. obtaining your food by photosynthesis
C. making your own food from the sun
D. obtaining your food by eating other organisms
Answer: D
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Animal models such as the ____________________ and ____________________ are being studied to identify single genes that control aspects of learning, memory, and spatial perception
Fill in the blank(s) with correct word
Alleles are
A) alternate forms of a gene. B) genes near each other on a chromosome. C) genes at opposite ends of a chromosome. D) genes that are only in pea plants.
The most prevalent mineral ion stored in and
released from bone tissue is a. phosphorus. b. iron. c. calcium. d. magnesium. e. manganese.
What is a defining characteristic of members of the Class Testudines?
A. They have a kinetic skull. B. They lack limbs. C. They have a four-chambered heart. D. They have a hard shell.