What breathes by relaxing the lungs?
Options:
- (A) mammals
- (B) tortoises
- (C) dogs
- (D) chickens
- (E) ducks
- (F) humans
- (G) crocodiles
- (H) animals
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Let's think first: Mammals breathe with the help of a diaphragm. Belly breathing uses the diaphragm, which helps relax the lungs. Mammals breathe by relaxing the lungs.... So the answer is [(A)]

The measurement of what falls from lower to higher altitudes?
Options:
- (A) snow
- (B) rain
- (C) Energy
- (D) heat
- (E) Inches
- (F) meters
- (G) H 2 O
- (H) motion
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Let's think first: Temperature falls from lower to higher altitudes. Heat and temperature are the same. Heat falls from lower to higher altitudes.... So the answer is [(D)]

How are plant cells around the vascular tissue created?
Options:
- (A) meiosis
- (B) metastasis
- (C) haleotosis
- (D) vegetation
- (E) shrub beds
- (F) made
- (G) homogenous
- (H) mitosis
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Let's think first: Secondary meristem is located within and around the vascular tissues. Plant cell types rise by mitosis from a meristem . Plant cells around the vascular tissues are created by mitosis.... So the answer is [(H)]

What occurs in response to a change in the environment?
Options:
- (A) relocation
- (B) sunlight
- (C) moonlight
- (D) artificial selection
- (E) ground to shake
- (F) Animal survival
- (G) natural selection
- (H) It helps them survive
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Let's think first: Evolution occurs in response to a change in the environment. Natural selection is the main mechanism of evolution. Natural selection occurs in response to a change in the envionrment.... So the answer is [(G)]

The next generation of an organism rises via:
Options:
- (A) Plants growth
- (B) spontaneous generation
- (C) reproduction
- (D) The Sun
- (E) revolution
- (F) sun's heat
- (G) heat energy
- (H) unions
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Let's think first: Reproduction is the process by which organisms give rise to offspring. Then, the lowest energy offspring are used as parents for the next generation. Reproduction is the process by which organisms give rise to the next generation.... So the answer is [(C)]

Temperature falls from the equator to
Options:
- (A) South Africa
- (B) Antarctica
- (C) Asia
- (D) our planet
- (E) Summer
- (F) during the day
- (G) South America
- (H) It decreases
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Let's think first: Temperature falls from the equator to the poles. First, strong winds circling Antarctica isolate the atmosphere near the pole the winter. Temperature falls from the equator to Antarctica.... So the answer is [(B)]