The distribution of fossils across the continents is one type of evidence.
Answer:
C) X=100%; Y=0%
B) X=50%; Y=50%
Explanation:
The oldest rocks on Earth are about four billion years old. When a rock forms, it contains unstable isotope and no daughter isotopes, so every rock will contain 100% parent isotope and 0% daughter isotope.
The half-life of the radioactive isotope Of this particular rock is 5730 years. The half-life is an amount of time needed for half of the parent isotope (50%) to become a daughter isotope. In this case, after 5730 years, half of the initial parent isotope will transform to daughter isotope, which means that after 5730 years, there will be 50-50 of the parent and daughter istotopes presented in the rock. After two half-lives, there will be only 25% of the parent isotope remaining (that’s half of the previous 50% which remained after first half-life), and after three half-lives, there will be only 12,5% of the parent isotope remaining and so on.
Answer:
A, B, D
Explanation:
They are what they have in common
Nunavut is the largest, northernmost, newest, and least populous territory of Canada.
Nunavut’s homicide rate is more than 12 times higher than the rest of Canada. Rates of violent crime including domestic abuse and robbery are disproportionately high.
Answer: I believe the answer is B. the Sahel
Explanation:
"The Sahel is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara to the north and the Sudanian Savanna to the south"(The Conversation).
The circled area acts as a boundary between what would be the Sahara desert above it so I would go with B.
