Which statement describes ovaries and egg cells?
A. A woman with only one ovary cannot conceive.
B. The ovaries produce eggs and manufacture sex hormones.
C. The ovaries are connected directly to the fallopian tubes.
D. The eggs cannot be fertilized outside the fallopian tubes.
B. The ovaries produce eggs and manufacture sex hormones.
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Due to its unusual habitat (inside the digestive tracts of other animals), the tapeworm lacks _____
A) a reproductive system B) a mouth C) a digestive tract D) a mouth and a digestive tract E) a reproductive and digestive system
What contribution did Charles Lyell make?
A) He found some bird specimens on the Galapagos Islands. B) He found some fossils of extinct species. C) He suggested that life evolves through physical changes within the life span of an organism. D) He provided the first evidence that the Earth is much older than was previously thought.
In DNA replication,
A. a new noncoding strand is made for the coding strand. B. a new coding strand is made for the noncoding strand. C. Both of these occur. D. None of these occur.
Which of the following lymphoid organs has the immunological function of filtering pathogens from the blood?
A. tonsils B. thymus C. spleen D. lymph nodes E. galt