I believe the answer is A.
Answer:
to maintain homeostasis these things must be controlled:
- pH levels in the body (I.e. the stomach)
- wanted levels
- sugar levels
- level of Co2 in our bodies
- blood glucose levels
- body temperature
we maintain homeostasis to ensure that our enzymes, which speed up or make chemical reactions are working well and work within he required conditions.
external things we can do to maintain homeostasis:
- wearing the appropriate clothing in summer and winter
- consuming the correct temperature beverages (i.e. cold drinks in summer)
- consumitn the correct temperature and nutrient required foods (I.e. nutritious pumpkin soup in winter)
we also shiver when we are cold - the friction between our muscles produces heat.
Answer: The center vacoule
Explanation:
Vacuoles are membrane-bounded vesicles whose functions vary in different kinds of cells. Mature plant cells generally contain a large central vacuole.
The plant cell central vacuole is a varsatile compartment. It can hold reserve of important organic material such as protein stockpiled and inorganic ions. Many plant cells use their vacuoles as a disposal sites for metabolic by-products that would endanger the cell if the accumulate in the cytosol.
Vacuoles may also help protect the plant against predators by containing compounds that are poisonous or unpalatable to animals.
Needle like leaves are protective by nature. They are protective to the branches because they deter animals from eating the leaves. This helps the plant/tree stay alive.
The sun appears more ob earth
