In a cow's udder, milk
A. contains Lactococcus.
B. contains Lactobacillus.
C. is acidic.
D. is sterile.
D. is sterile.
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Which of the following statements describes a eukaryotic chromosome?
A) a single strand of DNA B) a series of nucleosomes wrapped around two DNA molecules C) a chromosome with different numbers of genes in different cell types of an organism D) a single linear molecule of double-stranded DNA plus proteins
The mesoderm is responsible for the formation of all
of the following organ systems EXCEPT the a. reproductive system. b. circulatory system. c. nervous system. d. muscle system. e. excretory system.
Which of the following is NOT a factor involved in
the concept of climate? a. wind speed b. humidity c. temperature d. soil composition e. cloud cover
The maximum number of individuals a habitat can support is called its
A) reproductive potential. B) carrying capacity. C) community size. D) density-dependent factor.