What do the building blocks of dna bind together to form?
Options:
- (A) A compound that donates proton
- (B) colors of the spectrum
- (C) Electrical energy
- (D) chain called a polynucleotide
- (E) Something with exactly eight protons
- (F) Something that makes plants green
- (G) Something with a head, thorax, and abdomen
- (H) biological diversity
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Let's think first: Many nucleotides bind together to form a chain called a polynucleotide. Nucleotides are the building blocks of DNA . The building blocks of DNA bind together to form a chain called a polynucleotide.... So the answer is [(D)]

What kind of animal is classified as having a vertebrae?
Options:
- (A) it keeps an organism warm
- (B) invertebrate
- (C) vertebrate chordate
- (D) gastropod shells
- (E) the body's largest organ
- (F) remains of prehistoric life
- (G) hard boned animals
- (H) roundworm
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Let's think first: Vertebrate chordates have a backbone. Invertebrates have no vertebrae or backbone. Vertebrate chordates have a vertebrae.... So the answer is [(C)]

What are the key cells in an allergy attack?
Options:
- (A) layers of fat
- (B) Lymphocytes.
- (C) fur and fat
- (D) bone cells
- (E) muscle cells
- (F) the skin
- (G) Red blood cells
- (H) animals
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Let's think first: Lymphocytes are the key cells involved in the immune response. An allergy attack is an immunal response. Lymphocytes are the key cells involved in an allergy attack.... So the answer is [(B)]

Bottleneck effect can occur with
Options:
- (A) external migration
- (B) direct damage to the lungs
- (C) Movement of an air mass
- (D) competition
- (E) if humans disturb bears
- (F) competing for resources
- (G) Plant growth is reduced
- (H) Temperature changing
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Let's think first: Bottleneck effect occurs when a population suddenly gets much smaller. Population growth is reduced by external migration. Bottleneck effect occurs with external migration.... So the answer is [(A)]

Which of the following uses energy that comes from body heat?
Options:
- (A) kinetic energy
- (B) evaporation of perspiration
- (C) kinetic friction
- (D) evaporation of snow
- (E) Transfers energy
- (F) a rock rolling down a hill
- (G) a fire burning near a campsite
- (H) converting mass to energy
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Let's think first: Evaporation of sweat uses energy, and the energy comes from body heat. Diaphoresis is a fancy medical term for perspiration or sweating. Evaporation of perspiration uses energy and the energy comes from body heat.... So the answer is [(B)]

Where are slime molds found?
Options:
- (A) flowers
- (B) loose dirt
- (C) animals
- (D) leaves
- (E) loose soil
- (F) swamp vegetation
- (G) rotting trees
- (H) an organism's body
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Let's think first: Slime molds are fungus-like protists commonly found on rotting logs and compost. Once the trees are cut, they become logs . Slime molds are fungus-like protists commonly found on rotting trees and compost.... So the answer is [(G)]