The sun is the ultimate original source of energy for all living things on Earth.
Explanation:
Cellular respiration is when cells take oxygen and food to make energy, and also water and carbon dioxide. For the organism to get oxygen, they breath in the air from the outside. The oxygen travels through the respiratory pathway to get to cells.
Answer:
cornea
Explanation:
When light rays reflect off an object and enter the eyes through the cornea (the transparent outer covering of the eye), you can then see that object. The cornea bends, or refracts, the rays that pass through the round hole of the pupil.
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Answer:
The follicular phase
Explanation:
The follicular phase of the ovarian cycle (days 1-14) coincides with the menses and proliferative phases of the uterine cycle.
During the follicular phase, the increased levels of follicle-stimulating hormone (FSH) from the anterior pituitary trigger the development of several follicles.
However, only one of these follicles continues the development and secretes estrogen. Under the influence of higher levels of estrogen, the endometrium of the uterus thickens and becomes more and more vascular and glandular.
