Answer:
Stomach is the correct answer.
Explanation:
- The stomach is the very important organ of the body that digests the food.
- The cells in the stomach secrete enzymes and hydrochloric acid that breaks the food chemically into small molecules.
- The stomach secretes substances that control the food digestion.
- The gastric juice is formed in the stomach and it contains hydrochloric acid, organic substances(pepsin, protein, mucus) it helps in the digestion of food.
Answer:
Remove waste
Explanation:
This is the urinary system, which removes salt waste and other wastes from the blood.
Answer:
C
Explanation:
E.g. length of day or season , weather
Answer:
The environmental factor that could lead to a decrease in genetic variation in a tuna population is an increase in pollution (second option).
Explanation:
There is a correlation between genetic variability and environmental pollution, the latter being a factor that impacts negatively on the variability of a specific population.
The concept of pollution stress not only implies a low rate of reproduction, but it is also a factor that prevents genetic exchange with other populations, which is a factor that makes the genetic variability decrease in a population.
For these reasons an increase in pollution implies a decrease in genetic variability in a tuna population.
- <em>Other options, such as </em><u><em>an increase in food availability</em></u><em>, a</em><u><em> decrease in tuna fishing
</em></u><em> or </em><u><em>a decrease in tuna predators</em></u><em>, are environmental factors that contribute to increased genetic variability.</em>