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.
c. Male lions compete for the right to mate with females, with only one possible winner.
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A wolf eats a rabbit that eats grass. The grass is a ________
A) consumer B) detritivore C) producer D) heterotroph
How does 0.5 M sucrose (molecular mass 342) solution compare to 0.5 M glucose (molecular mass 180) solution?
A) Both have 6.02 × 1023 molecules. B) Sucrose has 171 molecules, whereas glucose has 90. C) Both have 3.01 × 1023 molecules. D) Sucrose has 171 mg/L, whereas glucose has 90 mg/L.
Which molecule do Bexxar and Zevalin antibodies attack?
a) EGF receptor b) actin c) CD20 d) collagen e) myeloid protein
What is the term that describes the complex of DNA and proteins that makes up a eukaryotic chromosome?
a. centriole b. centrosome c. chromatin d. centromere