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Third Nine Weeks Review Part 2
Test Description: Review
Instructions: Answer all questions to get your test result.
1) Which is not a chemical change?
A
acid in your stomach helping break down food so it can be absorbed
B
enzymes in the small intestine breaking food into smaller compounds that will be used by the body
C
saliva moistening your food so that it can easily slide down the espophagus
D
enzymes in your saliva starting to break down food in your mouth
2) Which of the following statements about reproduction is true?
A
asexual reproduction invovles two parents and the offspring are genetically identical to one of the parents
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
sexual reproduction involves one parent and the offspring has their DNA in a different order
3) If an island had more black jaguars than spotted jaguars-what is most likely the explantation?
A
spotted jaguars are better at camouflaging
B
over time, the jaguars decided that black was the best color to survive in their environment
C
the temperature of the island caused the jaguars coats to be black
D
black jaguars are mating with other black jaguars-which means the black gene has a better chance of being passed down
4) Which type of organic compounds is broken down into simple sugars?
A
nucleic acids
B
lipids
C
carbohydrates
D
proteins
5) What is the monomer (building block) of proteins?
A
oils
B
sugars
C
nucleic acids
D
amino acids
6) Which is not a physical change?
A
your teeth crushing your food
B
sugar dissolving in water
C
enzymes breaking down food into simpler substances
D
water freezing into ice
7) 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
The corn plants passed their survival genes to the kikuya so more of them lived
C
the weed killer changed over time and adapted to kill the corn plants not the weeds
D
As some of the kikuya were strong enough to survive,they produced offspring that were also likely to survive the weed killer
8) Which is most true regarding offspring of asexual reproduction?
A
the offspring came from one parent and has two copies of the parents DNA
B
the offspring came from two parents and each is identical to the other
C
the offspring came from two parents and are genetically diverse
D
the offspring came from one parent and are identical to the parent
9) process in which only organisms best suited to a particular environment survive
A
variation
B
adaptation
C
selective breeding
D
natural selection
10) 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
*select an answer for all questions
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