B. Choose a value at random to represent the average number of leaves on a tree.
C. Count the number of leaves on a single tree and assume all trees are the same.
D. Divide the total number of leaves on all the trees in a forest by 50,000.
Answer:
A
Explanation:
b. two hundred million years ago.
c. two billion years ago.
d. two hundred billion years ago.
The hypothesis of continental drift is used to explain an event that happened
a. two million years ago.
b. two hundred million years ago.
c. two billion years ago.
d. two hundred billion years ago.
The answer is (b) Two hundred million years ago
Answer: b. two hundred million years ago.
Continental drift is a scientific theory was developed by Alfred Wegener (1880-1930). He was a German meteorologist, who proposed the hypothesis that continents were the part of huge landmass or supercontinent about 200 million years ago. These continents got separated or splitted from their parent continent and drifted to other locations. He named the parent or supercontinent as "Pangaea" (which means "all lands" in Greek) which began to break up.
The answer is D. In this case, there is no cycling of energy or matter. In the choice A, water and nutrients are absorbed from the soil to make up the tree. In choice B, the carbon dioxide from the atmosphere is used to make carbohydrate in the tree. In choice C, part of the biomass of the shrimp is converted into biomass and energy of the salmon.
a. True
b. False