2)
Which describes a trait from a recessive gene?
A) It causes a mutation.
B) It masks a dominant gene trait.
C) It can appear if it is heterozygous.
D) It usually appears only if it is homozygous.
3)
An isolated population of great purple hairstreaks, a species of butterfly, lives in a damp meadow. The larvae feed only on a species of mountain clover plant that lives in the meadow. The adult does not fly far from the clover plants as well. One rainy summer, a fungus causes most of the clover plants to die.
As a result of the absence of clover, the hairstreak population in this location will MOST LIKELY
A) increase and flourish.
B) switch to a different type of food.
C) decrease to a level near extinction.
D) evolve immediately into a new species of butterfly.
4)
Which relationship is an example of commensalism?
A) Hyenas and lions fight over the same antelope kill.
B) A tapeworm lives in the intestine of a dog, obtaining food for itself, while slowly harming the dog.
C) Remora fish stick to large sharks, receiving a free ride and scraps of food the shark does not eat. The shark is neither helped nor harmed.
D) A diamondback rattlesnake and a gopher turtle share a burrow. The turtle digs the hole, and the snake provides protection from predators for the turtle.
5)
Peppered moths vary in color from light gray to almost black. The color of any moth depends on how many black spots are found on its wings. The name "peppered" refers to these black spots. During the day, the moths rest on trees. In England where the moths live, many light gray trees were covered with soot that came from the smoke stacks of factories.The trees got darker and darker from the soot.
In the countryside of England, where there are no factories, we expect there to be
A) no moths.
B) mostly dark gray moths.
C) mostly light gray moths.
D) an even number of light and dark moths.
6)
Scientists previously referred to the long-ago deposited plant and animal remains, now buried, compacted, and transformed into coal and oil, as the dead-end of the carbon cycle. Since the Industrial Revolution, that would be an inaccurate statement. Why?
A) The carbon found in coal and oil is released back into the atmosphere as carbon dioxide.
B) Factories burning coal and oil deposit industrial wastes that add carbon back into the environment.
C) The carbon stored in the coal and oil combines with water in the atmosphere and falls back to Earth.
D) The combustion of coal and oil releases nitrogen by-products into the environment to be used again by man.
Answers
2) c option
3)c
4)d
5) b
6) d
Explanation:
2) Which describes a trait from a recessive gene? A)It causes a mutation. B)It masks a dominant gene trait. C)It can appear if it is heterozygous. D)It usually appears only if it is homozygous. 3) An isolated population of great purple hairstreaks, a species of butterfly, lives in a damp meadow. The larvae feed only on a species of mountain clover plant that lives in the meadow. The adult does not fly far from the clover plants as well. One rainy summer, a fungus causes most of the clover plants to die. As a result of the absence of clover, the hairstreak population in this location will MOST LIKELY A)increase and flourish. B)switch to a different type of food. C)decrease to a level near extinction. D)evolve immediately into a new species of butterfly. 4) Which relationship is an example of commensalism? A)Hyenas and lions fight over the same antelope kill. B)A tapeworm lives in the intestine of a dog, obtaining food for itself, while slowly harming the dog. C)Remora fish stick to large sharks, receiving a free ride and scraps of food the shark does not eat. The shark is neither helped nor harmed. D)A diamondback rattlesnake and a gopher turtle share a burrow. The turtle digs the hole, and the snake provides protection from predators for the turtle. 5) Peppered moths vary in color from light gray to almost black. The color of any moth depends on how many black spots are found on its wings. The name "peppered" refers to these black spots. During the day, the moths rest on trees. In England where the moths live, many light gray trees were covered with soot that came from the smoke stacks of factories.The trees got darker and darker from the soot. In the countryside of England, where there are no factories, we expect there to be A)no moths. B)mostly dark gray moths. C)mostly light gray moths. D)an even number of light and dark moths. 6) Scientists previously referred to the long-ago deposited plant and animal remains, now buried, compacted, and transformed into coal and oil, as the dead-end of the carbon cycle. Since the Industrial Revolution, that would be an inaccurate statement. Why? A)The carbon found in coal and oil is released back into the atmosphere as carbon dioxide. B)Factories burning coal and oil deposit industrial wastes that add carbon back into the environment. C)The carbon stored in the coal and oil combines with water in the atmosphere and falls back to Earth. D)The combustion of coal and oil releases nitrogen by-products into the environment to be used again by man.