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Biology

How does matter and energy relate to biological organisms?​

The following are the steps for B-cell activation. The steps are in an incorrect order. 1. B cells display antigens in MHC class II receptors on the cell surface. 2. Antibodies released by plasma cells bind to antigen so they will be destroyed by other cells of the immune system. 3. B cells rearrange their DNA to create a unique B-cell receptor. 4. B cells 1)The following are the steps for B-cell activation. The steps are in an incorrect order. 1. B cells display antigens in MHC class II receptors on the cell surface. 2. Antibodies released by plasma cells bind to antigen so they will be destroyed by other cells of the immune system. 3. B cells rearrange their DNA to create a unique B-cell receptor. 4. B cells become activated by interacting with helper T cells. 5. B cells undergo clonal expansion. 6. B cells digest antigens that bind to the antibodies on their surface.

Immunity from vaccination: a. lasts longer than natural immunity. b. only lasts for a few days is not as effective as natural immunity. c. prevents disease 100 percent of the time.

Viruses can cause infections and reproduce____ ^^

Pancreatic cells incorporate radioactively labeled amino acids into proteins, allowing researchers to track the proteins' intracellular locations. We are particularly interested in tracking an enzyme that pancreatic cells ultimately secrete. Therefore, the most probable pathway for this protein within the cell is: A. ER -> Golgi -> Nucleus B. Golgi -> ER -> Lysosome C. Nucleus -> ER -> Golgi D. ER -> Golgi -> Vesicles that fuse with the plasma membrane E. ER -> Lysosomes -> Vesicles that fuse with the plasma membrane The correct answer is D: ER -> Golgi -> Vesicles that fuse with the plasma membrane.

The nurse discusses the recommended weight gain during pregnancy with a newly pregnant client who is 5 ft 3 in (160 centimeters) tall and weighs 130 lb (59 kilograms). The nurse explains that, with the recommended weight gain, the client should weigh how much by term?

The letters bpm stand for what phrase in cardiac measurement

True or False: Species diversity hurts ecological succession?OTRUEOFALSEType here to search​

Mimulus lewisii and Mimulus cardinalis occupy the same habitat but do not interbreed in nature. However, they can be crossed in the laboratory to produce fertile offspring. Which of the following is a likely reason that prevents these plants from interbreeding in nature? A) They only reproduce by self-pollination. B) They have incompatible gametes. C) They exhibit seasonal differences in flowering.

The ______ layer of the GI tract contains blood vessels, so it can be the site of an inflammatory response that leads to inflammatory bowel disease.

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