Identify four threats to the biodiversity in your own environment and briefly explain each threat

Which incident would result in primary succession instead of secondary succession?

Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.