Q: How often does sperm develop in humans? Read this paragraph and choose the correct option from the provided answers: Choices: - monthly - sporadically - rarely - continuously A:
continuously

Q: Endocytosis and exocytosis are types of vesicle transport that carry very large molecules across what structure? Read this paragraph and choose the correct option from the provided answers: Illustration of the two types of vesicle transport, exocytosis and endocytosis. Endocytosis and exocytosis are types of vesicle transport that carry very large molecules across the cell membrane. Choices: - cell substrate - the heart - dermis - cell membrane A:
cell membrane

Q: Q: What is caused by the same virus that causes chicken pox? Read this paragraph and choose the correct option from the provided answers: Preston Hunt. Shingles is caused by the same virus that causes chicken pox . CC BY 3.0. Choices: - blisters - mumps - boils - shingles A:
A: shingles

Question: Q: The word antibiotic comes from the greek anti, meaning "against," and bios, meaning this? Read this paragraph and choose the correct option from the provided answers: The Antibiotic Crisis The word antibiotic comes from the Greek anti, meaning "against," and bios, meaning "life. " An antibiotic is an organismproduced chemical that is hostile to the growth of other organisms. Today's news and media often address concerns about an antibiotic crisis. Are antibiotics that were used to treat bacterial infections easily treatable in the past becoming obsolete? Are there new "superbugs"bacteria that have evolved to become more resistant to our arsenal of antibiotics? Is this the beginning of the end of antibiotics? All of these questions challenge the healthcare community. One of the main reasons for resistant bacteria is the overuse and incorrect use of antibiotics, such as not completing a full course of prescribed antibiotics. The incorrect use of an antibiotic results in the natural selection of resistant forms of bacteria. The antibiotic kills most of the infecting bacteria, and therefore only the resistant forms remain. These resistant forms reproduce, resulting in an increase in the proportion of resistant forms over non-resistant ones. Another problem is the excessive use of antibiotics in livestock. The routine use of antibiotics in animal feed promotes bacterial resistance as well. In the United States, 70 percent of the antibiotics produced are fed to animals. The antibiotics are not used to prevent disease, but to enhance production of their products. Choices: - bacteria - germ - virus - life A:
Answer: life

*Question*
Q: Which cell gives rise to all cells of the human body? Read this paragraph and choose the correct option from the provided answers: ability to diversify at each step. The totipotent stem cell is the zygote, or fertilized egg. The totipotent (toti- = "all") stem cell gives rise to all cells of the human body. The next level is the pluripotent stem cell, which gives rise to multiple types of cells of the body and some of the supporting fetal membranes. Beneath this level, the mesenchymal cell is a stem cell that develops only into types of connective tissue, including fibrous connective tissue, bone, cartilage, and blood, but not epithelium, muscle, and nervous tissue. One step lower on the hierarchy of stem cells is the hemopoietic stem cell, or hemocytoblast. All of the formed elements of blood originate from this specific type of cell. Hemopoiesis begins when the hemopoietic stem cell is exposed to appropriate chemical stimuli collectively called hemopoietic growth factors, which prompt it to divide and differentiate. One daughter cell remains a hemopoietic stem cell, allowing hemopoiesis to continue. The other daughter cell becomes either of two types of more specialized stem cells (Figure 18.4): Lymphoid stem cells give rise to a class of leukocytes known as lymphocytes, which include the various T cells, B cells, and natural killer (NK) cells, all of which function in immunity. However, hemopoiesis of lymphocytes progresses somewhat differently from the process for the other formed elements. In brief, lymphoid stem cells quickly migrate from the bone marrow to lymphatic tissues, including the lymph nodes, spleen, and thymus, where their production and differentiation continues. B cells are so named since they mature in the bone marrow, while T cells mature in the thymus. Myeloid stem cells give rise to all the other formed elements, including the erythrocytes; megakaryocytes that produce platelets; and a myeloblast lineage that gives rise to monocytes and three forms of granular leukocytes: neutrophils, eosinophils, and basophils. Choices: - signaler stem cell - omnipoten stem cell - schwann stem cell - totipotent stem cell A:
**Answer**
totipotent stem cell

(Question)
Q: When gas particles collide, what kinds of collisions are these considered? Read this paragraph and choose the correct option from the provided answers: Collisions of gas particles are elastic, so no energy is lost. Choices: - inelastic - perfect - conservative - elastic A:
(Answer)
elastic