Master Biology with Fun Quizzes & Brain Teasers!

Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom which term best describes carbon dioxide? A Mixture B atoms C elements D compound
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How do we detect the cosmic microwave background radiation?A. by looking for a glow in the night skyB. by looking for radiation at the blue end of the spectrumC. through magnifying glassesD.through radio telescopes
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Why does ice float on water?A.The temperature of ice is lower than the temperature of water.B.The temperature of water and ice are the same.C.The density of Ice is less than the density of water.The density of ice is greater than the density of water.D.ResetNext
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why are butterflies important? What are they doing to help nature?
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Name 3 some sources of C02.
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Observe: Click Next. What happens in the cytoplasm?
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EXPLAIN Complete the statement by coloring, bolding, or highlighting the correct terms. Before the reaction, there are two | four | eight | oxygen atoms, and after the reaction, there are (two | four | eight |) oxygen atoms. The same is true for hydrogen atoms. So, atoms are | are not created or destroyed. This supports | refutes the claim that matter is conserved during a chemical reaction.
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Anne was observing a cell under a microscope which was undergoing binary fission. Which type of cell was Anne observing?A. Eukaryotic animal cellB. Eukaryotic plant cellC. Prokaryotic cell
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Identify the parts of the digestive system. Select all that apply. * 5 points stomach esophagus large intestine lungs
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Which statement best describes the function of nucleic acids?A. Stores genetic information and helps to make proteinsB. Increases the rate of chemical reactionsC. Stimulates metabolism in all body cellsDActivates secretion of the body's hormones
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Cant see To find an answer
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Name 2 differences between plant and animal cells.
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Choose the word or phrase that best completes each sentence about the worldwide domestication of plants andanimals.Different plants were domesticated to grow cropsA major cause of the agricultural revolution was theA major effect of the agricultural revolution was
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Taxes that are paid by individuals on all money earned, including investments, are .Taxes that are paid by homeowners to state and local governments are .Taxes that businesses are required to pay on their earnings throughout the course of a year are.1.progressive.2income3corporate1.property2.regressive3.corporate1. direct2. proportional3. corporate
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What do geysers indicate about the temperature of Earth's interior? (science)
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The plastics industry realized more than 20 years ago that recycling plastics was a necessity for our planet. Can you recognize the important facts about recycling plastics? ALL BUT ONE statement is true. That is A Only plastics marked with the #1 resin code can be recycled economically.Only plastics marked with the #1 resin code can be recycled economically.B Recycled bottles and containers are used to produce lumber products that can be used as an outdoor building material.Recycled bottles and containers are used to produce lumber products that can be used as an outdoor building material.C Every ton of plastic bottles recycled saves about 3.8 barrels of oil.Every ton of plastic bottles recycled saves about 3.8 barrels of oil.D Because different types of plastic must be recycled separately, the numbers on plastic containers are there to help consumers and recycling centers with sorting.
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does the cytosol play a role in eukaryote metabolism
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Just like vertebrate animals, plants possess excretory systems. One way that plants excrete waste products is by opening pores in the surfaces of their leaves. These pores, called stomata, help a plant maintain homeostasis by allowing the plant toA.release substances, such as oxygen and water.B.collect substances, such as ammonia and salt.C.destroy substances, such as sap and uric acid.D.make substances, such as chlorophyll and resin.
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Test and ImprovePart AJanelle placed a thermometer in the plastic bag in her oven, and Corey placed a thermometer underneath theplastic wrap in his oven. They placed their ovens out in the Sun for one hour. At the end of the hour, they recordedthe temperature in each oven.Solar OvenJanelle's cone ovenCorey's shoe box ovenFinal Temperature (F)148112Identify the design that worked better. Was your prediction correct? Why do you think this design got hotter thanthe other?
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Analyze the composition and location of each rock in the table below. Use this information to answer the following question.Which rock would most likely experience the highest rate of chemical weathering?TableRockCompositionLocation
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When doing medical research with human subjects, which four limitations are unavoidable? Its often impossible to repeat trials on the same subjects. Subjects may report an inaccurate medical history. It can be difficult to control all possible variables. Its impossible to come up with testable scientific questions for human subjects. There are ethical or privacy concerns to consider.
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Which of the following occurs during interphase?A. Chromosomes line up in the middle of the cellB. DNA replicates C. Chromosomes pull away from the equator of the cellD. Chromosomes become visible
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What occurs during metaphase of the cell cycle?A. DNA replicates B. Chromosomes condense C. Chromosomes reduce to half the number of the original cellD. Chromosomes line up along the middle or equatorial plate
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During cytokines, what is occurring?A. Cell divides into two daughter cellsB. Cell divides into two sister cellsC. Chromosomes pull away from the middle of the cellD. DNA replicates
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