Answer:
1. optic disk 2. fovea centralis
Explanation:
<span>Pepsin is secreted in an inactive state, Pepsinogen, this is so that it doesn’t begin destroying the gastric gland(autodigestion). When it reaches the lumen it is activated by the hydrochloric acid. Cells in the wall secrete a mucus, which prevents it from eating away at the wall.</span>
Answer:
Spore/sporophyte
Explanation:
The sporophyte is the generation of plants that bear spores. Sporophytes are formed by a division in the zygote and are mostly diploid in nature. The specific structures present on the sporophyte are called sporangia. Spore mother cells present inside the sporangia undergo meiosis to produce haploid spores. For example, the diploid microspore mother cells present in the microsporangia in the anther of flowering plants divide by meiosis to produce haploid microspores.
Answer:
D, Flagella
Explanation:
Ribosomes produce proteins for the cells to function, chloroplasts provide a plant cell with photosynthesis, vacuoles provide a plant cell with holding its structure up, and mitchondria provides ATP (energy) for the cell to function.
Fertility rate is the average number of children borne per woman until the end of her r<span>eproductive life given a specific geographic space.
It can be calculated by summing all the specific f</span>ertility rate for each woman (average number of births/woman through five-year age groups) from 15-49.