Identify the five commonly available methods of birth control and indicate which ones provide the most protection against STDs.
What will be an ideal response?
Abstinence - provides protection against STDs
Morning-after pills - does not provide protection against STDs
Contraceptive vaccines - does not provide protection against STDs
Male condom - provides protection against STDs
Female condom - provides protection against STDs
Intrauterine device - does not provide protection against STDs
Male hormonal birth control - does not provide protection against STDs
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Why is it important that the glycerol heads of the cell membrane be facing toward the extracellular and intracellular environment?
a. They are hydrophilic. b. They are hydrophobic. c. They have both hydrophilic and hydrophobic properties. d. They have neither hydrophilic or hydrophobic properties.
Land plants most likely evolved from which of the following organisms?
a. brown algae b. red algae c. green algae d. bryophytes e. seedless vascular plants
________ prevent the backflow of blood in veins
Fill in the blank(s) with correct word
Landscape ecology ________
A) is the application of ecological principles to the study of land-use patterns B) focuses primarily on how to restore human-altered ecological systems C) deals primarily with ecosystems in urban settings D) deals with the study of the ranges of different species