Daily Biology Puzzles & Riddles - Challenge Yourself!

compare systems for digestion in an amoeba to those in a mouse.
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When the codes hidden inside our genes come out to light as physical traits, we call it _____:A. translation.B. transcription.C. replicationD. gene expression.
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Natural selection acts on populations through a specific trait.Which statement must be true about that trait?O The trait is passed on genetically to the next generation.O The trait is resistant to mutations.O Most forms of the trait have the same impact on survival.O The trait is the same for all organisms.
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How long would it take an oxygen molecule in blood to travel 1 meter if it did so by diffusion rather than by being transported by the circulatory system
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You isolate a novel yeast from Antarctica and discover that the yeast has lots of gene for generating public goods outside of the cell. Would this pattern lead you to expect that the species had likely evolved growing primarily on surfaces, or floating freely in the ocean
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B-cell receptors bind to antigens that are either freely dissolved or present on the surface of invading or foreign cells. T-cell receptors ________.
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During the production of various proteins involved in the coagulation of blood and in bone metabolism, vitamin K serves as
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29. Mobility contributes to positive outcomes throughout the body. What is a positive effect of mobility on the respiratory system
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The trp operon is repressed when tryptophan binds to the repressor; otherwise this operon is transcribed. Tryptophan acts as a/an:
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The phenotypic range exhibited by individuals with a particular genotype under differing environmental conditions is called the of .
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Putting an antibiotic resistance gene in a recombinant plasmid used for genetic engineering makes: Group of answer choices replica plating possible direct selection possible the recombinant cell dangerous the recombinant cell unable to survive
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In response to an action potential along the transverse tubules, the __________ release(s) calcium ions into the sarcoplasm.
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Why are Simmias and Cebes unsatisfied with these two arguments (from opposites and from recollection)
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If an epigenetic change is maintained only at a given site and does not affect the expression of a gene elsewhere in the nucleus, it is a ______ mecha
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Exercise and emergency reactions include Group of answer choices increased activity in all parts of the peripheral nervous system. increased activity in the sympathetic, and decreased activity in the parasympathetic branches. decreased activity in the sympathetic, and increased activity in the parasympathetic branches. increased activity in the enteric nervous system. reduced heart rate and blood pressure.
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To separate plasma from the cellular components, blood tubes should be counterbalanced and centrifuge for __________ minutes at ________ rpm.
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A beaker of water is sitting on a sensitive spring scale. If you dip your finger into the water, but do not touch the side of the beaker, and the beaker does not overflow, what happens to the reading of the scale
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When you raise your hand to answer a question in class, which synovial joint movement allowed this to occur
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The second part of a PCR cycle involves annealing the primers. Which conditions will encourage annealing of the primer to the genetic region of interest
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The process by which a cell specializes to carry out a specific role is called _____. Please choose the correct answer from the following choices, and then select the submit answer button. mitosis
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During exercise, we might expect blood vessels in the skeletal muscle to be somewhat _______________ and the blood vessels in the digestive organs to be somewhat ____________.
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Taste and smell are two distinct senses in animals living in terrestrial environments. Animals living in aquatic environments, however, have no distinction between taste and smell. Which response might explain this difference
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A forest ecosystem can support a limited number of bears. This is because: Group of answer choices the base of the food chain is seasonal light that supports photosynthesis is limited during certain times of the year bears hibernate during the winter available energy is lost from one trophic level to the next
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To uncover the mutation, the F2 females produced by the previous mating are crossed back to their father. What is the point of doing this backcross
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