Which of the following were confusing
discoveries that called into question the
concept that species didn’t change?
a. isolated species that looked similar to
species that lived considerable distances
away
b. organisms that had some similar
characteristics but other characteristics that
were very different
c. organisms with similar structures that have
different functions
d. body parts with no apparent function
e. all of these were confusing discoveries that
called into question the concept that species
didn’t change
E
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Mechanical digestion in the human digestive system is best illustrated by ____
a. absorption b. amylase c. bacterial action in the large intestine d. chewing e. pepsin
How do endolithic (living inside rock) microbes make a living in bedrock beneath soil? What kind of trophy do they engage in?
What will be an ideal response?
Which of the following is not a method of contraception?
a. progestin b. tubal ligation c. IUDs d. RU-496 e. spermicidal foam
Which statement is not correct with regard to redox (oxidation-reduction) reactions?
A) A molecule is reduced if it loses electrons. B) A molecule is oxidized if it loses electrons. C) An electron donor is called a reducing agent. D) An electron acceptor is called an oxidizing agent. E) Oxidation and reduction always go together.