Which feature of the microscope did anton van leeuwenhoek add that enabled him to magnify organisms about 250 times?

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

What are the 3 types of artificial cloning

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?