Answer: Maintainance of constant internal environment is carried out in a process called Homeostasis.
Explanation:
Maintainance can of several types such as pH, temperature, and other substances such as Concentration of Ammonia in body. These all should maintain at constantly for stability in body. The maintenance of temperature is called thermo regulation.
Answer:
Organism having the suitable traits appears more in the population.
Explanation:
Natural selection is a non-random process in the biological traits becomes less or more common in the population due to the different rate of survival of their bearer or their differential reproduction.
Natural selection leads to evolution because those organisms are selected to survive and reproduce which are having those traits that are better suited to a certain set of environmental conditions over others. As a result, the number of these organisms increases over time and they appear more in the population.
So natural selection leads to evolution as an organism having the suitable traits appears more in the population.
Easy,
1- Proteins gives us energy
2- Proteins help us in cell repair and they take part in cell reproduction
3- Proteins contain powerful particles that diffuses and give energy to do work
4- Proteins are powerful
Birds were a major widespread during this time period therefore the answer is the last option
Sometimes called mechanical weathering, physical weathering is the process that breaks rocks apart without changing their chemical composition. These examples illustrate physical weathering:
Swiftly moving water
