Answer:
Thymine and uracil or adenine have two hydrogen bonds between them, whereas guanine and cytosine have three.
The hottest of all stars are <u>blue stars</u>!
I hope this counts - cell wall! helps keep most materials out but allows specific materials to pass through. animal cells do not have a cell wall
Answer:
If you think of the earthworm body plan as a drinking straw within a pipe "lining the straw" is the most of the tissues that developed from endoderm.
Explanation:
The physique of the earthworm is segmented which appears like numerous tiny rings combined or merged collectively. The earthworm is made of around 100-150 segments. The segmented body portions deliver significant organizational purposes. Segmentation can help the earthworm move. Each segment or piece has muscles and bristles named setae. The bristles or setae support anchor and governs the worm when stirring over soil. The bristles grasp a segment of the worm definitely into the ground while the other portion of the physique projects forward. The earthworm usages parts to either contract or relax self-sufficiently to source the body to grow in one area or contract in other areas. Division supports the worm to be supple and sturdy in its drive. If each section stimulated collectively deprived of being self-governing, the earthworm would be stationary.
Answer;
-Antigen presenting cells
Explanation;
-Helper T cell and inflammatory T cell TCRs recognise epitopes displayed by MHC class II molecules on the surface of antigen-presenting immune cells, including: macrophages that engulf foreign particles such as bacteria; dendritic cells that present antigen to T cells; and B cells that produce antibodies.
-Antigen-present cells APCs engluf antigens, present fragments of antigens to be recognized by T cells
. Major types; dendritic cells in connective tissues and epidermis, macrophages in connective tissues and lymphoid organs &B cells.
