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EOC Biology Assessment Test Questions with Complete Solution. Cell Wall - Answers-A rigid structure that surrounds the cells of plants, fungi, many protists, and most bacteria Chloroplast - Answers-A plastid containing chlorophyll; the site of photosynthesis Chromatin - Answers-The DNA and proteins in a non-dividing cell Chromosome - Answers-DNA and protein in a coiled, rod-shaped form that occurs during cell division Cilium (cilia) - Answers-A short, hairlike organelle that extends from a cell and functions in locomotion Cytoplasm - Answers-The region of a cell between the cell membrane and the nucleus Cytoskeleton - Answers-A network of long protein strands in the cytosolthat helps maintain the size and shape of the eukaryotic cell
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Cell Wall - Answers-A rigid structure that surrounds the cells of plants, fungi, many protists, and most bacteria Chloroplast - Answers-A plastid containing chlorophyll; the site of photosynthesis Chromatin - Answers-The DNA and proteins in a non-dividing cell Chromosome - Answers-DNA and protein in a coiled, rod-shaped form that occurs during cell division Cilium (cilia) - Answers-A short, hairlike organelle that extends from a cell and functions in locomotion Cytoplasm - Answers-The region of a cell between the cell membrane and the nucleus Cytoskeleton - Answers-A network of long protein strands in the cytosolthat helps maintain the size and shape of the eukaryotic cell Cytosol (cytoplasm) - Answers-The gelatin like aqueous fluid that bathes the organelles on the inside of the cell membrane Endoplasmic Reticulum - Answers-A system of membranous tubes and sacs in eukaroyotic cells that functions as a path along which molecules move from one part of the cell to the other Flagellum (flagella) - Answers-A hair-like structure made up of microtubles that function in locomotion Fluid Mosaic Model - Answers-A model of cell membranes structure representing the dynamic nature of membrane lipids and proteins Golgi Apparatus - Answers-A system of membranes in eukaryotic cells that modifies protiens for export by the cell Lysosome - Answers-A organelle containing digestive enzymes, existing primarily in animal cells Microtubule - Answers-A hollow tube of protein that constitutes the largest strand in the cytoskelton Mitochondria - Answers-The organelle that is the site of aerobic respiration in eukaryotic cells
Nuclear Envelope - Answers-A double membrane that surrounds the nucleus of eukaryotic cells Nuclear Pore - Answers-A small hole in the nuclear envelope through which substances pass between the nucleus and the cytoplasm Ribosome - Answers-An organelle that funtions in the synthesis of proteins Rough Endoplasmic Reticulum - Answers-The portion of the endoplasmic reticulum that contains attached ribosomes Selectively Permeable Membrane - Answers-A membrane that keeps some molecules out but allows others to pass through Smooth Endoplasmic Reticulum - Answers-The portion of the endoplasmic reticulum that lacks attached ribosomes Spindle Fiber - Answers-One of the microtubles that extend across a dividing eukaryotic cell; assists in the movement of chromosomes Vacuole - Answers-A fluid filled organelle that store enzymes of metabolic waste material Concentration Gradient - Answers-the difference of a concentration of substance across a space Contractile Vacuole - Answers-an organelle in protists that expels water Diffusion - Answers-the process, by which, molecules move from an area of greater concentration to an area of lesser concentration Equilibrium - Answers-a state that exists when the concentration of a substance is equal throughout a space Facilitated Diffusion - Answers-a process in which substances move down their concentration gradient across the cell membrane with the assistance of carrier proteins Ion channel - Answers-a membrane protein that provides a passage way across the cell membrane through which the ion can diffuse Osmosis - Answers-the diffusion of water through a selectively permeable membrane Passive transport - Answers-the movement of substances across the cell membrane without the use of cell energy
Death rate - Answers-the ratio of deaths in an area to the population of that area Life expectancy - Answers-an expected time to live as calculated on the basis of statistical probabilities Population Density - Answers-number of individuals per unit area Carrying capacity - Answers-largest number of individuals of a population that a environment can support Emigration - Answers-movement of individuals out of a population Exponential Growth - Answers-population growth pattern where a population grows faster as it increases in size Growth rate - Answers-the rate of increase in size per unit time Immigration - Answers-movement of individuals into an area occupied by an existing population Inbreeding - Answers-the act of mating closely related individuals Limiting factor - Answers-factor that causes the growth of a population to decrease Logistic growth - Answers-growth pattern in which a population's growth rate slows or stops following a period of exponential growth Archaebacteria - Answers-considered ancient life forms that evolved separately from bacteria and blue-green algae Chemosynthesis - Answers-synthesis of carbohydrate from carbon dioxide and water Endosymbiosis - Answers-a process in which unicellular organisms engulfed other cells, which became endosymbiants and eventually organelles in the host cell. gave rise to red and green algae., a process in which unicellular organisms engulfed other cells, which became endosymbiants and eventually organelles in the host cell. gave rise to red and green algae. Ozone - Answers-a colorless gas (O3) soluble in alkalis and cold water Species area effect - Answers-pattern of species richness; larger areas usually contain more species than smaller areas Species diversity - Answers-the variety of organisms in a community Stability - Answers-A community's resistance to change
Commensalism - Answers-the relation between two different kinds of organisms when one receives benefits from the other without damaging it Competition - Answers-the struggle between organisms to survive in a habitat with limited resources Herbivore - Answers-consumers that eat only producers Host - Answers-an animal or plant that nourishes and supports a parasite Mutualism - Answers-the relation between two different species of organisms that are interdependent Parasite - Answers-an animal or plant that lives in or on a host (another animal or plant) Parasitism - Answers-the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage) Pollinator - Answers-an insect that carries pollen from one flower to another Predator - Answers-any animal that lives by preying on other animals Prey - Answers-animal hunted or caught for food Symbiosis - Answers-any relationship in which two species live closely together with mutalism, commensalism, parasitism Carnivore - Answers-a consumer that consumes other consumers Chemosynthesis - Answers-synthesis of carbohydrate from carbon dioxide and water Consumer - Answers-an organism that obtains energy by eating other organisms Decomposer - Answers-organisms in an ecosystem that break down organic material (dead organisms, their waste, etc.) Detritivore - Answers-obtain energy from plant and animal remains and other dead matter Food chain - Answers-(ecology) a community of organisms where each member is eaten in turn by another member Food web - Answers-(ecology) a community of organisms where there are several interrelated food chains
Multicellular organism - Answers-organism made up of many cells Natural selection - Answers-a natural process resulting in the evolution of organisms best adapted to the environment Organism - Answers-a living thing that has (or can develop) the ability to act or function independently Photosynthesis - Answers-the process by which plants and some other organisms use light energy to power chemical reactions that convert water and carbon dioxide into oxygen and high energy carbohydrates such as sugars and starches Reproduction - Answers-The process by which an animal or plant gives rise to another of its kind. Sexual reproduction - Answers-reproduction involving the union or fusion of a male and a female gamete Unicellular organism - Answers-an organism made of a single cell Cell division - Answers-the process in reproduction and growth by which a cell divides to form daughter cells Development - Answers-(biology) the process of an individual organism growing organically Metabolism - Answers-the organic processes (in a cell or organism) that are necessary for life Chemical reaction - Answers-(chemistry) a process in which one or more substances are changed into others Compound - Answers-(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight Covalent bond - Answers-a chemical bond that involves sharing a pair of electrons between atoms in a molecule Element - Answers-any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter Mass - Answers-is the measure of the amount of matter in an object. Matter - Answers-that which has mass and occupies space
Molecule - Answers-(physics and chemistry) the simplest structural unit of an element or compound Nucleus - Answers-a part of the cell containing DNA and RNA and responsible for growth and reproduction Activation energy - Answers-the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur Catalyst - Answers-(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected Energy - Answers-(physics) the capacity of a physical system to do work Enzyme - Answers-any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions Product - Answers-a chemical substance formed as a result of a chemical reaction Reactant - Answers-a chemical substance that is present at the start of a chemical reaction Neutron - Answers-an elementary particle with 0 charge and mass about equal to a proton Hydrogen bond - Answers-a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond Polar - Answers-when one end of a molecule has has a partial charge Adenosine triphosphate - Answers-principal chemical compound that cell uses to store energy Macromolecule - Answers-any very large complex molecule Monomer - Answers-a simple compound whose molecules can join together to form polymers Organic compound - Answers-any compound of carbon and another element or a radical Polymer - Answers-a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers
Ribonucleic acid - Answers-(RNA) part of the genetic material that organisms inherited from their parents Steroid - Answers-any hormone affecting the development and growth of sex organs Substrate - Answers-the substance acted upon by an enzyme or ferment Chlorophyll - Answers-green pigment in plants that absorbs light energy used to carry out photosynthesis Electron transport chain - Answers-A sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP. Pigment - Answers-a colored chemical compound that absorbs light, producing color Stoma - Answers-a minute epidermal pore in a leaf or stem through which gases and water vapor can pass