They use tools to help take precise measurements, carry out experiments, and make observations.
Answer:
A variation is different to an adaptation as a variation is a difference or variety inside a species, for example a different breed of dog such as a spaniel is a variety of the dog species, whereas an adaptation is a genetic mutation that has developed in order to help an animal survive, such as giraffes having a long neck. Adaptations continue throughout the species due to natural selection.
<span>Because of the U shaped tube having a selective permeable membrane, the number of the water molecules on the sides changes but the number of the sugar molecules remain same. This particular cell membrane is such that it lets only specific kind of molecules and ions pass through.</span>
Explanation:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.
