How many times has earth's magnetic field reversed polarity in the last 4 million years? (Its not 5)

What are 3 functions blood serves in the body?

Why do we die of old age? I'm not looking for answers like 'the organs shut down,' or 'our body stops producing genes.' I'm looking for why that happens.

Which release spores as part of their life cycle? Select all answers that are correct. mosses pistils ferns pollen tubes

During what phase do tetrads line up at the equator

Which form of coal burns the hottest?

Why are some sediments smaller than others

Ethanol is produced during what cycle or fermentation

Explain briefly why there is a limitation on how big a cell can be. Include in your explanation the relationship between a cell's size and its surface area and how this affects what the cell can do.

Which effect is most likely caused by nondisjunction during meiosis? A. an extra chromosome B. an increase in nuclei C. increased survival benefits from traits D. only two types of nitrogenous bases

A segment of dna that codes for rna and a protein is a