Male dogs use what in their urine to mark their territory?
Options:
- (A) hydrocarbons
- (B) volatile substances
- (C) kinetic energy
- (D) an area swollen with pus
- (E) Chemical energy
- (F) competing for resources
- (G) add a solute
- (H) Positive charges
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Let's think first: Male dogs use pheromones in urine to mark their territory. Generally, pheromones are volatile substances. Male dogs use volatile substances in urine to mark their territory.... So the answer is [(B)]

What is the average weather in a place over time?
Options:
- (A) mild
- (B) Summer
- (C) deserts
- (D) acclimate
- (E) seasons
- (F) climate
- (G) temperature
- (H) climatic
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Let's think first: Climate is the average weather in an area over a long period of time. Eilat is the safest place in the area. Climate is the average weather in a place over a long period of time.... So the answer is [(F)]

What causes the penis to develop?
Options:
- (A) Creatine
- (B) Energy
- (C) Estrogen
- (D) Testicles
- (E) matter vibrating
- (F) Testosterone
- (G) movement
- (H) It expands
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Let's think first: Testosterone stimulates the reproductive organs to develop into male organs. Male mammals have a tube-like organ called the 'penis'. Testosterone causes the penis to develop.... So the answer is [(F)]

What can be reduced when a population suddenly gets much smaller?
Options:
- (A) Pollution
- (B) The size of the Earth
- (C) Greenhouse gasses
- (D) The size of bottlenecks
- (E) The size of the environment
- (F) Genetic variation
- (G) Plant growth is reduced
- (H) Quality of life
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Let's think first: Bottleneck effect occurs when a population suddenly gets much smaller. Genetic variation can be reduced by random genetic drift, population bottlenecks, founder effect. Genetic variation can be reduced when a population suddenly gets much smaller.... So the answer is [(F)]

Plant growth, biodiversity, and adaptations of land organisms is influenced by:
Options:
- (A) sun's heat
- (B) fossils
- (C) Greenhouse gasses
- (D) animals
- (E) global warming
- (F) the environment
- (G) Darwin
- (H) Greenhouse gases
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Let's think first: Climate influences plant growth, biodiversity, and adaptations of land organisms. Global warming is a part of climate change. Global warming influences plant growth, biodiversity, and adaptations of land organisms.... So the answer is [(E)]

Where does human fertilization naturally take place?
Options:
- (A) hard shelled egg
- (B) petri dish
- (C) bushes
- (D) man
- (E) Earth
- (F) eggs
- (G) woman
- (H) orchids
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Let's think first: Fertilization takes place inside the female organism. Fatty tissue in a woman's body produces female hormones. Fertilization takes place inside a woman.... So the answer is [(G)]