Answer:
the outer core is a hot liquid made of nickel and other things the crust is the outermost part of the earth comprised of the tectonic plates the inner core is comprised of iron and nickel and is solid the mantle is comprised of magma
Explanation:
"Sex Cells" or "haploids" are needed in order to add variation in DNA. If there was no "haploids" (which are just cells with 23 Chromosomes), then the female would not need the male for reproduction, basically meaning birth of an identical twin to the mother. The two haploids, the female's ova (Egg) and male's sperm meet, creating a zygote, or a fertilized egg.
This makes sure there is "immediate variation", and it isn't just ten generations of the same "Bob"!
Answer: The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.
Explanation:
Since our bodies are made up of 70 percent water, we need water to keep us from dehydrating, food is important because it has the nutrients and proteins that our bodies need to repair, grow, and keep healthy, and oxygen is also important because it gets carried throughout our blood stream and oxygenates our muscles, without any of these, we would die within a few weeks
