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Biology

Why are rna and dna−rna hybrids denser than double-stranded dna?

Justin Parker

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What substance combines with oxygen in cellular respiration? A) fat B) sugar C) water D) carbon dioxide

Brandon Scott

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Which of the following is an example of an eccentric contraction? A. DANCE MOVE b. INJURING A DOMINANT MUSCLE C. BICEP CURL D. SLOWLY PUTTING A HEAVY OBJECT DOWN

Amanda Johnson

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Which of the following best explains the importance of Earth’s crust to living organisms? a.The continental crust allowed the evolution of life on land. b. The crust provides raw materials necessary for life. c. The crust allowed the formation of fossil fuels. d. The rock cycle recycles sedimentary rocks formed from animal shells.

Victoria Fowler

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How many amino acids are found in living organisms? 2 5 10 20

Victoria Fowler

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What important discovery did researchers aboard the alvin make

Alexa Spicer

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Which stem cells are capable of the most limited differentiation? a.) adult stem cells b.) amniotic fluid stem cells c.) embryonic stem cells d.) somatic stem cells?

Rodney Fox

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What statement is true about microevolution?

Annie Barnes

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The gradient of a stream depends on its A. base level. B. speed. C. bank level. D. stream channel.

Brandon Scott

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An open-minded scientist does all of the following except: A. think creatively to design experiments. B. ask questions about observations. C. question existing ideas. D. hold on to his or her beliefs even if there is no evidence for those beliefs. (*)

Ashley Howard

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Which of the following is an ozone depleting substance (ODS)? a. ultraviolet radiation b. chlorofluorocarbon (CFC) c. biogeochemical cycle d. none of the above

Kathy Robinson

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Photosynthesis is an endergonic reaction. Why?.

Bethany Evans

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Weather patterns are MAINLY caused by the.. A. rotation of the Earth B. uneven heating of the Earth C. Gravitational pull of the moon D. distance of the Earth's from the Sun

Jodi Brooks

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Which describes a disruption in the water cycle that could affect photosynthesis? A. Heat causes an excess of transpiration. B. Heat causes an excess of evaporation. C. Heat causes an excess of condensation. D. Heat causes an excess of precipitation.

Jessie Thompson

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Which of the following is a nonrenewable resource? a. geothermal b. solar c. nuclear d. biomass

Kristi Hammond

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Water is an example of a(n) _____.

Alexa Spicer

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Polyps are distinct organisms that live in communities that make up coral. T or D

Victoria Fowler

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Which of the following populations is more likely to reach Hardy–Weinberg equilibrium? large population residing on an isolated island small population, reproductively isolated, branched off from a larger population large population residing in an earthquake–prone city

Kyle Mckinney

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True or False: Most familiar life forms live in regions of biomes that humans inhabit.

Victoria Fowler

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Which of the following does not occupy the bottom of an energy pyramid? a. phytoplankton b. trees c. grass d. zooplankton

James Washington

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Channels within the structure of the cell membrane are composed of A) carbohydrates. B) disaccharides. C) phospholipids. D) proteins.

Samantha Barber

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How do fungi play an essential role in maintaining equilibrium in an ecosystem? By forming symbiotic relationships with animals By being parasitic on plants and animals By acting as decomposers on dead plants and animals

Megan Page

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Ecology that focuses on dynamic changes occurring in one species is _____ ecology. 1) population 2) applied 3)systems

Kathy Robinson

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The building blocks of proteins are known as

James Washington

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How could a collision between two sea floor plates produce volcanic activity?

Blair Lewis

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What happens during the S subphase of interphase? A.The DNA replicates, producing two copies of each chromosome. B.The sister chromatids move to opposite poles. C. The cell separates into two daughter cells.

Curtis Rhodes

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Biogeochemical cycles _______. a. are not essential for life b. move through abiotic and biotic regions c. are the result of natural disasters d. provide the greatest amount of energy for the Earth

Rodney Fox

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A new species that forms in only one generation is an example of _____.

Jennifer Patterson

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The cells in cardiac muscle would probably have a high number of what

Eric Morgan

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Illustrate the factors that allow the aquatic pyramid of biomass to be inverted.

Caroline Campbell

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Write a paragraph comparing the organelles in a cell to the organs in your body.

Amanda Johnson

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Which of the following is an unsegmented worm with a pseudocoelom. A. sponge B. cnidarian C. arthropod D. roundworm

Zach Chandler

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Which of the following is a healthy blood pressure level? A. 120/95 B. 130/80 C. 110/75 D. 115/85

Amanda Johnson

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Chromosomes are attached to the spindle fibers during _____. anaphase interphase prophase metaphase

Eric Morgan

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The quality of a rock based on size and shape

Alexa Spicer

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When might an increase in biodiversity lead to a decrease in the stability of an ecosystem?

Nicholas Rivera

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A pea plant exhibits a recessive trait. Which statement is most likely true about the plant? A. The plant is identical to its parent plant. B. The plant has different alleles for the gene that codes for the trait. C. The plant has two identical alleles for the gene that codes for the trait. D. The plant does not have the same genes for the trait as its parent plant.

Daniel King

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Analyzing data in graphs or charts allows you to? A -make observations B -make predictions C -run new experiments D -create new tools BEST answer

Craig Stewart

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Identify the roles played by human gut bacteria. identify the roles played by human gut bacteria. ulcers are caused by the acid-tolerant bacterium helicobacter pylori. the human appendix houses mutualistic bacteria that digest cellulose. human gut bacteria synthesize all essential vitamins required by humans.

Donald Ward

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The first outward sign of puberty in a typical girl is _____. a. the development of muscular strength b. an increase in weight c. the onset of nipple growth incorrect d. a spurt in height

Rodney Fox

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In order for individuals to have trust in a relationship, they have to be honest with one another. t or f

Chelsea Hayes

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Boycotting and picketing are examples of __________. science forums

Deborah Edwards

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Why are many bacterial infections more difficult to treat now than they were fifty years ago?

Melissa Norris

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Smooth muscle, a type of specialized muscle cell, functions in which process? 1. food digestion 2. skeletal movement 3. pumping of blood 4. heart contraction

Samantha Barber

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______ is a rock with a fine, dark texture that makes up the oceanic crust.

Ross Pratt

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Which of the following makes the best analogy to describe the movement of energy in an ecosystem? A. pool B. lake C. river D. pond

Eric Morgan

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Which measurement unit represents volume?

Kevin Sutter

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Photosynthetic algae create sugars that will eventually be broken down during which process

Kathy Robinson

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