Answer the following question given this paragraph: 22.2 Structure of Prokaryotes Prokaryotes (domains Archaea and Bacteria) are single-celled organisms lacking a nucleus. They have a single piece of circular DNA in the nucleoid area of the cell. Most prokaryotes have a cell wall that lies outside the boundary of the plasma membrane. Some prokaryotes may have additional structures such as a capsule, flagella, and pili. Bacteria and Archaea differ in the lipid composition of their cell membranes and the characteristics of the cell wall. In archaeal membranes, phytanyl units, rather than fatty acids, are linked to glycerol. Some archaeal membranes are lipid monolayers instead of bilayers. The cell wall is located outside the cell membrane and prevents osmotic lysis. The chemical composition of cell walls varies between species. Bacterial cell walls contain peptidoglycan. Archaean cell walls do not have peptidoglycan, but they may have pseudopeptidoglycan, polysaccharides, glycoproteins, or protein-based cell walls. Bacteria can be divided into two major groups: Gram positive and Gram negative, based on the Gram stain reaction. Gram-positive organisms have a thick cell wall, together with teichoic acids. Gram-negative organisms have a thin cell wall and an outer envelope containing lipopolysaccharides and lipoproteins. Q: What is the group of single-celled organisms lacking a nucleus that have a single piece of circular dna in the nucleoid area of the cell? Choices: - chromosomes - algae - eukaryotes - prokaryotes A:
prokaryotes
(Question)
Answer the following question given this paragraph: Increasing or decreasing the temperature of a system at equilibrium is also a stress to the system. The equation for the Haber-Bosch process is written again below, this time as a thermochemical equation. Q: Increasing or decreasing the temperature of a system in what state acts as a stress to the system? Choices: - gaseous - nitrogen - liquid - equilibrium A:
(Answer)
equilibrium
Ques: Answer the following question given this paragraph: Inhaling is an active movement that results from the contraction of a muscle called the diaphragm. The diaphragm is large, sheet-like muscle below the lungs (see Figure below ). When the diaphragm contracts, the ribcage expands and the contents of the abdomen move downward. This results in a larger chest volume, which decreases air pressure inside the lungs. With lower air pressure inside than outside the lungs, air rushes into the lungs. When the diaphragm relaxes, the opposite events occur. The volume of the chest cavity decreases, air pressure inside the lungs increases, and air flows out of the lungs, like air rushing out of a balloon. Q: Contraction of what large, sheet-like muscle results in inhalation? Choices: - pelvic floor - uterus - deltoid - diaphragm A:
Ans: diaphragm
(Q).
Answer the following question given this paragraph: The organs in Figure below make up the gastrointestinal (GI) tract. This is essentially a long tube that connects the mouth to the anus. Food enters the mouth and then passes through the rest of the GI tract. Food waste leaves the body through the anus. In adults, the GI tract is more than 9 meters (30 feet) long!. Q: What term describes the long tube that connects the mouth to the anus? Choices: - metabolism tract - esophagus tract - lungs tract - gastrointestinal tract A:
(A).
gastrointestinal tract
Ques:Answer the following question given this paragraph: Like the cells of all eukaryotes, animal cells have a nucleus and other membrane-bound organelles (see Figure below ). Unlike the cells of plants and fungi, animal cells lack a cell wall. This gives animal cells flexibility. It lets them take on different shapes so they can become specialized to do particular jobs. The human nerve cell shown in Figure below is a good example. Its shape suits its function of transmitting nerve impulses over long distances. A nerve cell would be unable to take this shape if it were surrounded by a rigid cell wall. Q: Unlike the cells of plants and fungi, animal cells lack what? Choices: - mitochondria - flagella - nuclei - cell wall A:

Ans:cell wall
Question: Answer the following question given this paragraph: Describe and explain volcanic activity that occurs within oceanic and continental plates. Q: What is the tectonic zone called where two plates come together? Choices: - precursors boundary - lateral boundary - paralleled boundary - convergent boundary A:
Answer:
convergent boundary