Third Nine Weeks Review Part 2 Question Preview (ID: 35935)
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Which is not a physical change?
a) sugar dissolving in water
b) enzymes breaking down food into simpler substances
c) water freezing into ice
d) your teeth crushing your food
A farmer has been using a weed killer to keep weeds from growing near his corn crops. A weed called kikuya died at first but then many kikuya plants were still alive after his week treatment. Which of the following best explains it?
a) The weed killer killed all of the other weeds in the garden and this let the kikuya thrive.
b) As some of the kikuya were strong enough to survive,they produced offspring that were also likely to survive the weed killer
c) the weed killer changed over time and adapted to kill the corn plants not the weeds
d) The corn plants passed their survival genes to the kikuya so more of them lived
Which type of organic compounds is broken down into simple sugars?
a) carbohydrates
b) proteins
c) nucleic acids
d) lipids
What is the monomer (building block) of proteins?
a) sugars
b) oils
c) nucleic acids
d) amino acids
If an island had more black jaguars than spotted jaguars-what is most likely the explantation?
a) over time, the jaguars decided that black was the best color to survive in their environment
b) the temperature of the island caused the jaguars coats to be black
c) black jaguars are mating with other black jaguars-which means the black gene has a better chance of being passed down
d) spotted jaguars are better at camouflaging
Which of the following statements about reproduction is true?
a) sexual reproduction involves one parent and the offspring has their DNA in a different order
b) sexual reproduction involves two parents and the offspring have a combination of DNA from each parent
c) asexual reproduction involves one parent and the offspring is dramatically different from the parent
d) asexual reproduction invovles two parents and the offspring are genetically identical to one of the parents
Which is not a chemical change?
a) enzymes in your saliva starting to break down food in your mouth
b) acid in your stomach helping break down food so it can be absorbed
c) enzymes in the small intestine breaking food into smaller compounds that will be used by the body
d) saliva moistening your food so that it can easily slide down the espophagus
Which is most true regarding offspring of asexual reproduction?
a) the offspring came from two parents and each is identical to the other
b) the offspring came from one parent and has two copies of the parents DNA
c) the offspring came from one parent and are identical to the parent
d) the offspring came from two parents and are genetically diverse
process in which only organisms best suited to a particular environment survive
a) adaptation
b) selective breeding
c) variation
d) natural selection
Brown eyes (B) is dominant over Blue eyes (b). If a person has blue eyes-what is their genotype?
a) Bb
b) BB
c) bb
d) BbB
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