What class is alos known as the "ray finned fishes"
A. Actinopterygii
B. Cephalaspidomorphi
C. Chonrichthyes
D. Myxini
E. Sarcoptergii
Answer: A. Actinopterygii
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What will be an ideal response?
Which of the following situations will lead to natural selection?
a. The seeds of two plants land near each other and grow to similar sizes. b. Two types of fish eat the same kind of food have the same number of offspring. c. Male lions compete for the right to mate with females, with only one possible winner. d. A drought in an agricultural area leads to a loss of different types of crops and plants.
In the Northern Hemisphere, seasonal variation in temperatures is caused mainly by ____
a. the Earth's elliptical orbit taking it closer to and farther away from the sun b. the Earth's tilt on its axis of 23.5? c. seasonal variation of output of energy from the sun d. warm equatorial air masses rising and spreading north and south e. uneven warming of the ocean's surface water
A(n) ____ is an offspring of a cross between
two individuals that breed true for different forms of a trait
a. homozygote b. recessive c. hybrid d. phenotype e. genotype