In this lab, the three flocks of birds changed in numbers between generation 1 and generation 3. why? check all reasons. the amount of food available increased and decreased. if a flock’s beak type made it easier to pick up the available food, the flock grew. if a flock’s beak type made it harder to pick up the available food, the flock shrunk.

Working in a lab means working under controlled environment. If in the generation 1 and generation 3, the number of bird’s increases or decreases in number, the possible conditions for this would

-The amount of food increased or decreased

-If a flock’s beak type made it easier to pick up the available food, the flock grows and vice versa

Justification: if the beak type for generation 1 makes the food intake easier, it will grow which ultimately decreases the food for the generation 3 which has un-supportive beak type.

A process of naturally determining the more fit and competitive species for survival is called natural selection.  It is a type of tool for evolution.

The beak type made it easier and difficult to pick up the available food.

The process by which an organism can change and adapt to the altered conditions of the living and resources are called natural selection.  The organism with favourable traits will be able to survive.

So, when the traits beneficial for survival is present then the organism can thrive and increase their population while when the traits are not beneficial for the altered condition then the organism will suffer from a decrease in population.

Therefore, options B and C are correct.

Learn more about the natural selection here:

link

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.