EOC 2019

Having freckles is dominant over not having freckles. If two individuals heterozygous for freckles have a child, what is the probability the child will have freckles?

• 0%

• 25%

• 50%

• 75%

Identical twin girls are separated at birth and cared for by two different families. After twenty years, the twins have different heights and weights. What is most likely the cause of these differences?

• One twin had a genetic condition that prevented her from growing tall.

• The DNA of one twin was different from the DNA of the other twin.

• Each twin was provided a different diet and physical activities.

• The proteins made by one twin were different than the proteins made by the other twin.

What is the function of a restriction enzyme?

• to control the movement of proteins into a cell

• to regulate blood sugar levels

• to produce hormones that regulate digestion

• to cut DNA at a specific nucleotide sequence

Some marine worms and mollusks go through similar larval stages during development. Which can be inferred about their relationship?

• They share a common ancestor

• The mate with each other

• They compete for a habitat

• The share the same food source

Which statement best describes natural selection?

• As the weather changes, organisms that are able to find shelter need less energy to live.

• Organisms that eat only plants need less food than organisms that eat animals.

• Organisms better adapted to their environment are more likely to reproduce and pass on their traits to their offspring.

• Small organisms are more likely to survive than larger organisms.

Some scientists claim recent evidence suggests birds should be reclassified to share more taxonomic groups with dinosaurs. What type of evidence would provide the best support for this claim?

• evidence showing birds shared similar habitats with dinosaurs

• evidence showing birds shared similar nutritional requirements as dinosaurs

• evidence showing birds shared similar behaviors with dinosaurs

• evidence showing birds shared a common genetic history with dinosaurs

This is a dichotomous key for selected arthropods. To which order does the caddis fly belong?

• Acarina

• Diptera

• Siphonaptera

• Trichoptera

Which molecules are joined together to make proteins?

• fatty acids

• nucleic acids

• amino acids

• acetic acids

Which word equation best represents the process of cellular respiration?

• carbon dioxide + glucose → oxygen + water

• carbon dioxide + water → glucose + oxygen

• glucose + oxygen → carbon dioxide + water

• oxygen + water → carbon dioxide + glucose

What type of organic molecules are enzymes?

• carbohydrates

• Lipids

• Nucleic Acid

• Proteins