____________ is best described as away of knowing. Science A well-tested explanation that explains a lot of observations is a theory A personal preference or point of view is a bias The process by which organisms keep everything inside their bodies within certain limits is called homeostasis. The branch of biology dealing with interactions among organisms and between organisms and their environment is called ecology The simplest grouping of more than one kind of organism in the biosphere is a community The lowest level of environmental complexity that includes living and nonliving factors is the ecosystem Give an example of a primary producers plants __________ get their energy by consuming only plants. herbivores __________ get their energy by consuming only other animals. carnivores What animals eat both producers and consumers? omnivores A word that means the same thing as consumer is heterotroph The repeated movement of water between Earth’s surface and the atmosphere is called the water cycle Nonliving factors in the environment abiotic Living factors within an ecosystem biotic Which are two ways a population can increase in size? increased in birthrate and immigration Something that controls the growth or size of a population is a limiting factor Competition, predator/prey relationships, parasitism, crowding, and disease are examples of density____________ limiting factors dependent Which are two ways a population can decrease in size? decreased birthrate and emigration The gray-brown haze often found over large cities is called smog Who used a compound microscope to see chambers within cork and named them “cells”? Robert Hooke What advance in technology made the discovery of cells possible? the microscope Cells are the basic units of life. All living things are made of cells. All cells are produced from existing cells. The following are principle of the__________ cell theory Looking at a cell under a microscope, you note that the cell lacks a nucleus. What kind of cell is it? prokaryote. Give an example of a prokaryotes? bacteria Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use? mitochondrion Storing DNA is a function of the nucleus Which organelle would you expect to find in plant cells but not animal cells? chloroplast Which of the following structures serves as the cell’s boundary from its environment? cell membrane Which means of particle transport requires input of energy from the cell? active transport An ______________is a group of organs that work together to perform a specific function. organ system A group of similar cells that perform a particular function is called a tissue. __________ is released from ATP when a phosphate group is removed. Energy Organisms that cannot make their own food and must obtain energy from external sources are called heterotrophs Autotrophs produce carbohydrates during photosynthesis In the overall equation for photosynthesis, six molecules of carbon dioxide and six molecules of water result in a molecule of sugar and six molecules of oxygen. The products of the lightdependent reactions are ATP, NADPH, and __________. oxygen gas Another name for the light-independent reactions is Calvin cycle The Calvin cycle takes place in the stroma What is a product of the Calvin cycle? high-energy sugars What is the correct sequence of events in cellular respiration? glycolysis Krebs cycle electron transport What are the reactants in the equation for cellular respiration? glucose and oxygen What is the products of cellular respiration? Water, Carbon dioxide, and ATP Cellular respiration is called an aerobic process because it requires oxygen Where does glycolysis takes place in the cell? cytoplasm Glycolysis requires how many ATP to get the reaction started? 2 ATP What are the electron carriers that plays a role in cellular respiration? NAD+ and FAD+ Cellular respiration uses 1 molecule of glucose to produce approximately ___ ATP molecules. 36 The two main types of fermentation are called alcoholic and lactic acid What high-energy electron carriers pass H+ ions onto the electron transport chain? NADH and FADH2