O molecules, cells, populations, ecosystems
Second option.
Answer:
Internal fertilization is the process when the syngamy (union of male and female gamete) occurs inside the female body after insemination using copulation. In contrast, External fertilization is the syngamy outside the female body, that is in the outer environment especially in water bodies.
Explanation:
Can I have brainliest
Carbon is very important for life. Especially plants. So, if you were to find carbon and nitrogen....there's life.
An ischemic stroke is the sudden loss of blood flow to an area of the brain. It results in loss of neurological function.
Ischemic stroke involves the obstruction of blood flow within the brain. The obstruction can be caused by a thrombotic or embolic occlusion of an artery in the brain.