It is possible to use molecular genetic techniques to characterize the T cells found in psoriasis plaques and compare them to the T cells found in healthy skin. In healthy skin, T cells have a wide diversity of T cell receptors. In other words, there are many different T cell clones found in healthy tissue. In psoriasis plaques, there are fewer T cell clones, but often there are a large number of T cells representing only a small number of clones (this is called oligoclonal expansion). There are usually many more T cells in total found in psoriasis plaques relative to healthy skin. Think about the implications of this finding. What conclusion is NOT supported by these findings?

a. specific T cells react with many different antigens in psoriasis
b. specific T cells react with skin antigens in psoriasis
c. specific T cells have expanded in psoriasis lesions incorrect
d. specific T cells have homed to psoriasis lesions

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds