Chemoautotrophs and photoautotrophs derive their carbon from
A. carbon dioxide.
B. proteins.
C. lipids.
D. carbohydrates.
Ans: A. carbon dioxide
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All living species in the Osteichthyes clade have endoskeletons composed entirely of cartilage
a. True b. False
What type of feedback is exemplified by the formation of a blood clot that results in the rise of blood pressure?
A. negative feedback B. positive feedback C. endocrine feedback D. nervous feedback E. hormonal feedback
All of the following statements describe characteristics of cancer cells EXCEPT which one?
A) Cancer cells may migrate to other locations in the body. B) Cancer cells often have an enlarged nucleus. C) Cancer cells lose the ability to control cell division. D) Cancer cells typically are overdifferentiated. E) Cancer cells no longer perform their specialized functions prior to becoming cancerous.
Which one of the following can create new alleles?
A) natural selection B) sexual reproduction C) mutation D) genetic drift