8. The cell wall<span> is the outer most covering of the </span>cell. ... The cell membrane<span> is present in almost all types of </span>cells<span>. The </span>cell wall<span> is present in bacteria, fungi, algae and plant </span>cell<span>.
9. </span><span>the spreading of something more widely.
10. </span><span>In </span>facilitated diffusion<span>, molecules only move with the aid of a protein in the membrane. In </span>simple diffusion<span>, molecules move down the concentration gradient but in </span>facilitated diffusion molecules move up the concentration gradient.
11. <span>a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one
12. </span>Differences<span>: </span>Passive Transport<span> (or Diffusion) moves ions from high concentration to low, using no metabolic energy. </span>Active Transport<span> moves ions from low concentration to high, using metabolic energy in the form of ATP. ... Both use ion channels to move ions across the cell membrane, in or out of the cell</span>
The history of three major discoveries that led to our current understanding of hominid evolution are as follows.
Explanation:
Raymond Dart a South African anatomist, discovered a skull of a young hominoid with a brain case and facial structure similar to an ape. He classified the organism as a new primate species. Australopithecus Africans which means Southern Ape from Africa.
An American Paleoanthropologist, Donald Johanson, Discovered the complete australopithecine skeletons that he called "lucy". The size of the braincase suggests that their brains had a small, apelike volume and not a larger human volume.
In 1964, anthropologists Louis and Mary Leakey described skull portions of another type of hominid in Tanzania. Leakey classified the hominid with modern humans in the genus Homo. Because stone tools were found near the fossil skull and named Homo Habilis means "handy human".
When part of the catch is discarded and not used is called a "bycatch". This occurs when other, usually smaller fish, get caught by accident by fishermen hoping to catch other kinds of fish.
Components of the dermis include: Blood vessels: Transport oxygen and nutrients to the skin and remove waste products.