The human genome consists of approximately _______ base pairs of DNA
A. 100,000
B. 1 million
C. 1 billion
D. 3 billion
E. 2 trillion
D
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Match the following items with the correct phrases.
_______1. Organisms that prefer salty environments are called ____________________. _______2. Organisms that have especially demanding nutritional requirements are called ____________________. _______3. Organisms that prefer environments having decreased concentrations of oxygen are called ____________________. _______4. Organisms that prefer refrigerator temperature are called ____________________. _______5. Organisms that grow best in environments containing increased concentrations of carbon dioxide are called _______________. a. capnophiles b. fastidious organisms c. halophiles d. microaerophiles e. psychrotrophs
In a population of Asian elephants, the death
rate equals the birth rate. This population has
a. reached its biotic potential. b. achieved zero population growth. c. not exceeded its carrying capacity. d. exponential growth. e. geometric growth.
Methane, which is composed of carbon and hydrogen, lacks functional groups and is a gas at room
temperature. Upon replacing one of the hydrogen atoms with a hydroxyl group, methane is converted to methanol, which is a liquid at room temperature. Explain the reason behind this difference in physical properties.What will be an ideal response?
What is the cause of blindness in mole rats?
a. They live in dry areas that do not provide enough moisture. b. They live in a group and do not need to see. c. They live in the light and are blinded by it. d. They live in underground darkness.