Vertebrate chordates have what part of the skeletal system?
Options:
- (A) spinal column
- (B) hard bones
- (C) aerobic capacity
- (D) cartilage bones
- (E) critical organs
- (F) joints
- (G) fur and fat
- (H) graptolites
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Let's think first: Vertebrate chordates have a backbone. Invertebrates are animals who lack a backbone or spinal column. Vertebrate chordates have a spinal column.... So the answer is [(A)]

What has a circulatory system with a two-chambered heart?
Options:
- (A) sharks
- (B) insects
- (C) salmon
- (D) animals
- (E) barnacles
- (F) mammals
- (G) tortoises
- (H) alpacas
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Let's think first: Fish have a circulatory system with a two-chambered heart. Fish include bass and salmon. Salmon have a circulatory system with a two-chambered heart.... So the answer is [(C)]

Alterations in genetic information may change a chromosome's structure or one
Options:
- (A) nitrogen
- (B) harm them
- (C) Plants growth
- (D) Damages them
- (E) spectrum
- (F) nuclear waste
- (G) nucelotide
- (H) nitrate
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Let's think first: Mutations may change the structure of a chromosome or just change a single nucleotide. Mutations are changes in genetic information. Alterations in genetic information may change the structure of a chromosome or just a single nucleotide.... So the answer is [(G)]