Answer:
add fur or fat to increase insulation
Explanation:
The endothermic animals are the animals that have developed an internal heating mechanism. This basically means that these animals do not depend on their environment for heat, but instead they produce it themselves. In order to be able to better produce their energy and keep it, these animals have developed traits that help them to increase the insulation, such as gaining on fat, fur, or feathers. The mammals are a prime example of endothermic animals, which is why they are successful in any type of environment.
It contributes to weather patterns and causes ocean currents that regulate climate.
Your answer would be Why are Sea Lampreys a problem in the Great Lakes?
In the text, it explains the answer for this question. For the other three questions, it's asking for a factor of the paragraph rather than the whole thing. The whole paragraph explains the answers for all of the questions, so it's best to ask why are they causing problems.
It would be 50% because having a son won't effect the probability of the next gender of the offspring. Unlike having to pick out two variables out of a bag, being pregnant is like having a trail but once you become pregnant again the trail restarts and does not use the previous data. You become a girl if you have 2 x chromosome and a boy by having one of x and one y. the odds are 50/50