Anton van leeuwenhoek is a scientist who saw cells soon after hooke did. he made use of a microscope containing improved lenses that could magnify objects almost 30ox. under these microscopes, leeuwenhoek found moving objects that he named "animalcules," which included protozoa and other unicellular organisms, like bacteria. he was also able to observe red blood cells and sperm cells. to which of the tenets of the cell theory did leeuwenhoek make the biggest contribution?

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin

What organ is the first to receive nutrients that have been absorbed from the digestive tract?