Answer:
"When the hypothalamus senses that you're too cold, it sends signals to your muscles that make your shiver and create warmth."
Answer:
He did not give a method on how the continents moved
Explanation:
In 1912, Alfred Wegener proposed the idea that the continents are slowly drifting around the Earth. This hypothesis was known as the continental drift. Wegener proposed that the Earth rotation might have been the cause for which the continents move to separate from each other. However, nowadays it is well-known that continents are landmasses localized on tectonic plates that move and interact with each other (and it is referred to as plate tectonics).
Answer:
is a sex cell.
Explanation:
The sperm cell is made up the head and the tail.
The head contains the DNA and genetics;while the tail gives it , the momentum it needs to reach it's desired target, and then fertilization occurs.
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Answer:
Those species that are more vulnerable to extinction are the big-sized ones, that reach their sexual maturity in a relatively advanced stage of their lives and have a low growth rate per capita. They have a low reproductive rate.
Explanation:
There are specific heritable traits such as reproductive rate, trophic level, dispersion capability, that influence different species and their trend to be more or less vulnerable to extinction. "k" species have a low growth rate per capita, but they are big competitors with the capacity of displacing other species and monopolizing the available resources. These are big-sized species that live for a long time, reaching sexual maturity in advanced stages of their lives. They do not have numerous progenies, and hence, they spend a lot of time in parenting. Any environmental disturbance seems to severely affect them. These animals have a higher risk of getting extinct than those species with short-lived and elevated reproductive rates.
For many mammals and birds, this is a linear relationship. The bigger is the species, the more prone to get extinct it is.
