Question:
The cows in a rancher's herd of cattle have been selectively bred to produce milk. Which of the following will cause the next generation of cows to receive the trait for producing large quantities of milk?
OPTIONS:
- nutrients in the cows' food
- essential minerals in the cows' water
- electrical impulses in the cows' brains
- information in the cows' chromosomes
Answer:
information in the cows' chromosomes
Question:
Rocks that contain fragments of bones, shells, and plant remains are most likely
OPTIONS:
- crystals.
- igneous.
- sedimentary.
- metamorphic.
Answer:
sedimentary.
Question:
The main function of the human digestive system is to
OPTIONS:
- break down foods for absorption into the blood
- exchange oxygen and carbon dioxide in the lungs
- release energy from sugars within the cells
- carry nutrients to all parts of the body
Answer:
break down foods for absorption into the blood
Question:
Which of the following is an example of heat transfer by conduction?
OPTIONS:
- a whole metal spoon getting hot when one end is in hot soup
- the inside of a car in the sun getting very hot
- a tar road getting hotter in the sun than a concrete sidewalk
- a fireplace fire heating a room on a cold day
Answer:
a whole metal spoon getting hot when one end is in hot soup