Can you name a species that has a definite advantage over another? Explain.?

Question

2. If only one species is considered the "fittest", why do we still have so many variations among species? Why do some birds have very long pointy beaks, while other birds have short flat beaks?

3. How do diseases affect natural selection?

Answer 1

Every species contributes something to the environment. You should open your book and read about it instead of trying to get people on here to answer your homework for you. What are you going to do when you have a test?

Answer 2

2.) There are many species which are fit enough to survive. They just fit into different sections of nature, that's all. It is only if they are directly competing for the same resource, and there are no alternatives, that one species will survive at the expense of another.

3.) There are several diseases which have had a dramatic effect on natural selection. The most notable is Malaria. Malaria kills over two million people every year, mostly children, mostly in Africa. Anyone who is slightly immune to malaria will have an increased chance of survival to adulthood. There are several mutations which have arisen which have contributed to resistance to malaria, the most notable are variant haemoglobins (like HbS, which causes sickle cell disease) and blood groups (malaria uses the Duffy group antigen to enter the red cell). Both HbS and the Duffy negative persist in populations because they offer resistance to Malaria.

Answer 3

The reason that the birds have different beaks is because they have to adapt to their environment and also to what they eat. The reason that theres so many variations of animals is just that is just evolving in other to survive in different types of environment.

Natural selection is affected by diseases because if your not strong you die and when your strong your not gonna die meaning that you have a more chance of survival and better chances to have offspring.

Answer 4

Because there is no such thing as evolution it is a theory.
Man has the advantage, no other creature has the capability of wiping all others out but man. And any creature removed from his natural enviroment is under the advantage of those who's native enviroment they have been placed in. They are out of their element so to speak, even the rabbit has his ability of a chance to escape in his own enviroment. Parrot type birds are at a disadvantage in North America, parakeets for example are picked and pecked terribly when loose here, because of the sharp beaked North American birds, where in South America the Parrot type is prevolent. So in this same vein when you "take the boy out of the hills" He is generally lost!

Answer 5

2. different species fill different niches, e.g. one bird species is good at getting one type of food while another is good at getting another type of food.
3. within a species there is variation, some of which is advantageous and some of which is disadvantageous. severe diseases are usually disadvantageous, and a member of a species with a disease usually has a lower probability of surviving and reproducing.