The Earth's atmosphere would have little or no oxygen. A by-product of photosynthesis is oxygen. Photosynthesis is the process by which green plants use energy from the sun to make their own food in the leaves. The process uses sun light, water and carbon dioxide to yield oxygen and simple sugars. The simple sugars are stored in form of starch for future use by the plants, while oxygen is either used for cellular respiration or released to the atmosphere. The process of photosynthesis adds oxygen to the atmosphere and uses carbon dioxide from the atmosphere.
4 because if you have a infection it causes you not to breath properly
It is process of producing female gametes and called creation of ovum
<span> benefit of an uneven production of gametes in oogensis is
</span><span>One haploid cell receives the majority of the nutrients from the cytoplasm
</span>so i conclude option A is correct
hope it helps
