Biology Finals: Practice Test
Terms in this set (66)
Neutrons and ________ are found in the nucleus of an atom.
Of the three subatomic particles, ________ are most involved in forming chemical bonds.
The elements oxygen and hydrogen can combine explosively to form ________.
A chemical bond formed by the transfer of electrons is a(an) ________ bond.
A water molecule is polar because there is an uneven distribution of electrons between the oxygen and the ________ atoms.
Water's ________ allows it to dissolve compounds such as table salt.
The stomach produces a(an) ________ that lowers the pH and helps digest food.
The pH scale is a measurement system that indicates the concentration of ________ in solution.
Because carbon atoms can bond to one another, they can form long ________ that can be almost unlimited in length.
Complex carbohydrates are to monosaccharides as polymers are to ________.
The elements or compounds that come out of a chemical reaction are ________.
Chemical reaction that ________ energy will not occur without a source of energy.
The energy needed to start a chemical reaction is called the ________.
The name of an enzyme usually ends in ________.
The study of interactions among organisms and between organisms and their physical surroundings is called ________.
Organisms within an ecosystem are ________ factors in that ecosystem.
Ecologists make ________ to study large scale phenomena.
Autotrophs capture energy from sunlight or ________ to produce food.
Plant eating animals such as cows are called ________.
Organisms that break down organic matter and return it to the environment are called ________.
What could an algae bloom be a result of?
Surplus of nitrogen.
In a four level energy pyramid, if the first level contains 5000 calories of energy, the third level will contain approximately ________calories.
Human activites such as mining and the production and application of fertilizer are part of the ________ cycle.
Living organisms require nitrogen to make nitrogen-containing compounds, such as ________ and nucleic acids.
Average year-after-year conditions are to climate as day-to-day atmospheric conditions are to ________.
Because of the Earth's curvature, the polar regions receive ________ sunlight than the tropical regions.
A species ________ is its ability to survive and reproduce under a range of environmental conditions.
Over time, some plants growing in an area are crowded out by other plants. The new plants use up water and nutrients needed by the previous plants. The disappearance of the first plants is due to ________.
Predator is to prey as herbivore is to ________.
Some orchids grow high on trees so that they can get enough light for photosynthesis. The trees are unaffected by the presence of the orchids. The relationship between the orchids and the trees is an example of ________.
Regrowth of grasses, ferns, wildflowers, and saplings after a forest fire is an example of ________ succession.
Mild, moist are from the Pacific Ocean and giant redwood trees characterize the ________.
north coniferous forest.
The ________ of an aquatic habitat depends partly on its distance from the equator and partly on its depth.
The water levels in estuaries change throughout the day because they are affected by ocean ________.
The practice of ________ is beneficial because it increases food production, but it also detrimental to the environment because it requires clearing a lot of land and using a lot of fertilizer and fossil fuels.
There is a town at the edge of a large lake. The people there decide to preserve nearby wetlands that naturally filter the town's water instead of allowing development in the wetland's area. If the town's people manage to provide for their own needs without long-term effects on the environment, then they have engaged in ________.
Ecologists believe that climate change is due partly to an increase in the concentration of ________ gasses in the atmosphere.
Electrons pass through thin slices of cells or tissues and produce flat, two dimensional images in ________ electron microscopy.
Depending on whether they have a ________, unicellular organisms are classified as either eukaryotes or prokaryotes.
Most of the time, the cell's genetic information is found as threadlike ________ in the cell's nucleus.
________ capture energy from sunlight and convert it into chemical energy.
________ convert chemical energy into compounds that are convenient for the cell to use.
The cell takes in food and water and eliminates wastes through its selectively permeable ________.
Molecules tend to move from an area where they are more concentrated to an area where they are less concentrated. This process is called ________.
Large molecules, such as glucose, that cannot cross the lipid bilayer can still move across the membrane through a type of passive transport called ________.
Some materials can move across the cell membrane against a concentration gradient by ________.
A cell's relatively constant internal physical and chemical conditions are called ________.
The cells in a multicelluler organisms have specific jobs. This is called cell ________.
Cells within a multicellular organism communicate by chemical signals. In order to receive and respond to a certain chemical signal, a cell must have a ________ for that chemical.
Cells keep only a small amount of ________ on hand and regenerate it as needed using energy stored in carbohydrates and other molecules.
Organisms such as hawks and leopards, that obtain energy from the food they consume are called ________.
Photosynthesis requires light, water, carbon dioxide, and light absorbing ________.
When temperatures drop in the autumn, ________ molecules break down, which causes the leaves to change colors.
Thylakoids are arranged in stacks known as ________.
When chlorophyll absorbs light, the light raises the energy of the ________ in the chlorophyll molecule.
The electron carrier ________ is converted to NADPH during the light-dependend reactions.
Plants produce ________ during the first stage of photosynthesis and because it is not used or needed in the second stage, it is considered to be a byproduct.
A membrane protein called ________ allows H+ ions to pass through the thylakoid membrane and into the stroma.
The electrons that chlorophyll loses to the electron transport chain are replenished by ________ molecules.
In many plants, the rate of photosynthesis ________ when the weather becomes very cold.
During ________ reproduction, cells can produce genetically different offspring, whereas during ________ reproduction cells produce genetically identical offspring
Prokaryotes reproduce by an asexual process known as ________.
Why are atoms considered neutral?
Because they have equal numbers of protons and electons.
What is mass number?
Total number of protons and neutrons found in an atom.
What is atomic number?
Total number of protons.
What is the difference between saturated and unsaturated?
Saturated has single carbon bonds
unsaturated has at least one double carbon bond.
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