What is the lining around the brain called?

What organisms carry out nitrogen fixation?

Which of the following is not a fossil fuel? copper petroleum coal natural gas I'm stuck between A and B

cross a pure homozygous white short flower with a pure dominant red y'all flower. what is the resulting offspring be genetically? What is their phenotype?

Briefly compare the pros and cons of inactivated versus live attenuated vaccines.

What is the process of applying safeguards to avoid a negative impact?

Where do you think this heat lamp is being used?

Battery disposal is a disadvantage of which form of energy?

If a cell has 4 pairs of chromosomes, after mitosis each daughter cell will have how many chromosomes?

Which two families of flowering plants provide protein for the majority of humans?

A. what are the primary abiotic factors that will affect life underwater? b. Explain how the abiotic factors such as depth, Temperature, and some other mentioned in the questions before affect aquatic organisms.