Wich microscope did Anton van Leeuwenhoek use to observe single-cell organisms?

Sugars and amino acids move into a cell via a) osmosis b) diffusion c) passive transport d) active transport

Name and describe 4 ways animals use energy

Suppose you increase your walking speed from 6 m/s to 15 m/s in a period of 2 s. What is your acceleration?

What is one example that science would not be able to test?

if a cubical cell with with 2 cm sides doubles the dimensions of its sides what change occurs to the ratio of its surface area to volume

Modern h. sapiens differ from the archaic form in that moderns have

Arid and semiarid lands are prone to desertification because of

Which statement describes a situation that would reduce the stability of a forest ecosystem? (1) A fierce predator is removed from the ecosystem. (2) The number of producers remains constant in the ecosystem.

A scientist is studying a region of an ocean floor she discovers a long deep canyon that runs parallel to the coastline of a nearby continent what can she inferred from her discovery

Anson is 75 years old and has recently been experiencing a change in his personality. He is acting more impulsively and does not seem to care about his loved ones, to whom he has always been very devoted.