Which of the following factors affect population size check all that apply?
All of the factors affect population size. Birth rate, death rate, immigration, emigration, disease, competition and predation, human activity and natural disasters and occurrences. Population size is the total number of individual organisms in a population.
What is the solution to overpopulation?
Overpopulation is Solvable! The only humane way to solve overpopulation is to reduce births below an average of two per family.
What causes logistic population growth?
When resources are limited, populations exhibit logistic growth. In logistic growth, population expansion decreases as resources become scarce, leveling off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.
What is the difference between predator and prey?
Prey animals are species that are food for other animals known as predators. Many predators may even be prey for larger predators. Predator species that are not prey for any other animals are known as the top predator.
Can a possum freeze to death?
As animals that originated in the Tropics, opossums can’t bulk up with subcutaneous fat as well as raccoons and other North American mammals, so they are in danger of freezing when temperatures dip below 19 degrees Fahrenheit. So it has to just sit in its den and burn energy.” Too many such nights and the animal dies.
Do fish play dead when scared?
Fish don’t act, let alone act dead. If they are looking weird, seem to be floating upside down for long stretches of time, swimming erratically, or showing their belly more than necessary, then it means there is something wrong with them.
How do I know if my fish is sleeping?
It’s pretty easy to tell when fish are sleeping: they lie motionless, often at the bottom or near the surface of the water. They are slow to respond to things going on around them, or may not respond at all (see some sleeping catfish here). If you watch their gills, you’ll notice they’re breathing very slowly.