Dna can be fixed with repair mechanisms of
Options:
- (A) CO 2
- (B) cells
- (C) three
- (D) plants
- (E) SO2
- (F) fungi
- (G) alleles
- (H) Seesaw
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Let's think first: Cells have multiple repair mechanisms to fix mutations in DNA. Genetic Mutations Genetic mutations occur frequently. Cells have repair mechanisms to fix genetic problems in DNA.... So the answer is [(B)]


What do male dogs use in urine to mark their territory?
Options:
- (A) Natural aphrodisiacs
- (B) competing for resources
- (C) Tails
- (D) Urine cleaner
- (E) Something coming from a gland
- (F) Chemical energy
- (G) an area swollen with pus
- (H) Chew toys
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Let's think first: Male dogs use pheromones in urine to mark their territory. Pheromones are natural aphrodisiacs. Male dogs use natural aphrodisiacs in urine to mark their territory.... So the answer is [(A)]


Cells with damaged dna are more likely to divide when exposed to what?
Options:
- (A) harmful substances
- (B) apoptotic genes
- (C) sulfur dioxide
- (D) a tumor suppressor
- (E) Electrical energy
- (F) heat or cold
- (G) immune system
- (H) a carcinogen
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Let's think first: Oncogenes promote the division of cells with damaged DNA. Carcinogenic or oncogenic effects cause cancer. Carcnogenic substances can promote division of cells with damaged DNA.... So the answer is [(H)]


What process helps provide resources for producers to create food?
Options:
- (A) animals
- (B) Exfoliation
- (C) decomposition
- (D) mastication
- (E) recycling
- (F) reproduction
- (G) ejaculation
- (H) Converting waste.
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Let's think first: Producers use energy and inorganic molecules to make food. Decomposition is the breakdown of organic molecules into inorganic molecules. Decomposition provides resources for producers to create food.... So the answer is [(C)]


Members of the myrmecocystus genus communicate via pheromones, which are a type of:
Options:
- (A) sense of smell
- (B) chemical receptor
- (C) organ
- (D) insects
- (E) chemical
- (F) sound
- (G) antennae
- (H) Vibrates
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Let's think first: Ants communicate with chemicals called pheromones. Honeypot ants are classified in the genus Myrmecocystus. Members of the Myrmecocystus genus communicate via chemicals called pheromones.... So the answer is [(E)]


What die quickly if a stroke occurs?
Options:
- (A) a fish
- (B) animals
- (C) brain cells
- (D) organs
- (E) critical organs
- (F) protons
- (G) neutrons
- (H) bones
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Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Let's think first: Brain cells die quickly if their oxygen supply is cut off. If the oxygen supply to the brain is cut off, a stroke can occur. Brain cells die quickly if a stroke occurs.... So the answer is [(C)]