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? Read this paragraph and choose the correct option from the provided answers: 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. Choices: - chromosomes - algae - eukaryotes - prokaryotes A:
prokaryotes

Q: What is the innermost layer of the sun called? Read this paragraph and choose the correct option from the provided answers: Because the Sun is not solid, it does not have a defined outer boundary. It does, however, have a definite internal structure with identifiable layers ( Figure below ). Since the layers are not solid, the boundaries are fuzzy and indistinct. From inward to outward, the layers are: the core, the radiative zone, and the convection zone. Choices: - Convection Zone - Chromosphere - Photosphere - the core A:
the core

Q: Q: Glucose and fructose are considered this type of sugar? Read this paragraph and choose the correct option from the provided answers: Glucose and fructose are monosaccharides, or simple sugars. Choices: - alcohols - complex carbohydrates - polysaccharides - monosaccharides, or simple A:
A: monosaccharides, or simple

Question: Q: Because these components of the endocrine system are transported via blood, they get diluted and are present in low concentrations when they act on their target cells. Read this paragraph and choose the correct option from the provided answers: Endocrine Signaling Signals from distant cells are called endocrine signals, and they originate from endocrine cells. (In the body, many endocrine cells are located in endocrine glands, such as the thyroid gland, the hypothalamus, and the pituitary gland. ) These types of signals usually produce a slower response but have a longer-lasting effect. The ligands released in endocrine signaling are called hormones, signaling molecules that are produced in one part of the body but affect other body regions some distance away. Hormones travel the large distances between endocrine cells and their target cells via the bloodstream, which is a relatively slow way to move throughout the body. Because of their form of transport, hormones get diluted and are present in low concentrations when they act on their target cells. This is different from paracrine signaling, in which local concentrations of ligands can be very high. Autocrine Signaling Autocrine signals are produced by signaling cells that can also bind to the ligand that is released. This means the signaling cell and the target cell can be the same or a similar cell (the prefix auto- means self, a reminder that the signaling cell sends a signal to itself). This type of signaling often occurs during the early development of an organism to ensure that cells develop into the correct tissues and take on the proper function. Autocrine signaling also regulates pain sensation and inflammatory responses. Further, if a cell is infected with a virus, the cell can signal itself to undergo programmed cell death, killing the virus in the process. In some cases, neighboring cells of the same type are also influenced by the released ligand. In embryological development, this process of stimulating a group of neighboring cells may help to direct the differentiation of identical cells into the same cell type, thus ensuring the proper developmental outcome. Direct Signaling Across Gap Junctions Gap junctions in animals and plasmodesmata in plants are connections between the plasma... Choices: - enzymes - antibodies - minerals - hormones A:
Answer: hormones

*Question*
Q: What kind of family is haumea part of? Read this paragraph and choose the correct option from the provided answers: Haumea is part of a collisional family. This is a group of astronomical objects that formed from an impact. This family has Haumea, its two moons, and five more objects. All of these objects are thought to have formed from a collision very early in the formation of the solar system. Choices: - eoan family - a moclobemide family - orbital family - a collisional family A:
**Answer**
a collisional family

Q: Which type of weathering causes changes int he rocks materials, chemical or mechanical? Read this paragraph and choose the correct option from the provided answers: The original rock is the source of the inorganic portion of the soil. Mechanical weathering breaks rock into smaller pieces. Chemical reactions change the rock's minerals. Choices: - liquid - nuclear - mineral - chemical A:
chemical