Which of the common molecules normally found in the body plays a role in the aging process,forming irreversible cross-linkages between proteins, and contributing to the stiffness and loss of elasticity we may experience with aging?

a) glucose b) phospholipids c) water d) NaCl e) ATP


a) glucose

Biology & Microbiology

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What two evolutionary agents are most responsible for decreases in genetic variation in a population?

What will be an ideal response?

Biology & Microbiology

This biome is situated around the equator and boasts the greatest biodiversity of any biome

A. temperate grassland B. chaparral C. savanna D. deciduous forest E. rain forest

Biology & Microbiology

Which of the following is a disadvantage of an

exoskeleton?

a. It does not provide as efficient a muscle anchorage as an endoskeleton. b. It allows for excess water loss. c. It must be shed for its owner to grow. d. It is not flexible enough to allow a full range of movements. e. It is not able to absorb pigments for sufficient camouflage

Biology & Microbiology

What are mycorrhizae?

a. connecting points between branching roots b. symbiotic associations between a fungus and plant roots c. specialized root hairs d. localized swellings in plant roots filled with nitrogen-fixing bacteria

Biology & Microbiology