Master Biology with Fun Quizzes & Brain Teasers!

at what week do fingernails start to form for a developing baby
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Using the drop-down menus below, identify the processes cells use to maintain homeostasis. A. is the movement of water along the concentration gradient. B. is the use of energy to move particles against the concentration gradient. C. is the movement of particles by diffusion without energy. D. is the movement of particles along the concentration gradient.
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A white cat and a brown cat reproduce and have two kittens. One of the kittens has brown fur, while the other kitten has white fur.Which of the following best explains why the kittens have different colors of fur?A. The kittens inherited different genes for fur color from their parents.B. The behavior of the kittens determined which fur color they would exhibit.C. The kittens fur color was determined based on what was most advantageous in their environment.D. The kittens fur color was determined by the environmental conditions when they were born.
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How does carbon enter the atmosphere?(MULTIPLE CHOICE) A). plant stomataB). release of CO2 by the oceans C). animal and human respirationD). transpirationE). decomposition of limestoneF). burning of fossil fuels
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Quick pls! 20 pts each Which of these statements best contrasts the dangers of working with cows versus horses?Horses spook or startle quicker than cows do, but cows are more combative. Cows tend to react as a herd, but horses react more quickly to danger. Horses are more naturally aggressive than cows, but cows weigh more. Cows are more territorial than horses, but horses are more protective
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A "hole in the heart" is actually an opening in the wall dividing the left and right sides of the heart. This wall is called the septum. This defect causes the deoxygenated blood from the right side to mix with the oxygenated blood from the left side. Propose some effects that would result from a hole in the heart
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Look at structure A. Use the drop downs to answer thequestions about this structure,What is the name of this part of the flower?What is the function of this part of the flower?Please help I will mark u as brainliest
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PLEASE HELP _____a_____ DNA is found in the nucleus, is _____b_____ in shape, and can be linked to a ____c_____. _____d_____DNA is found in the mitochondria, is _____e_____ in shape, and can be linked to a _____f______
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Intact mitochondria are obtained and an artificial proton gradient is created with high concentrations of protons in the mitochondrial inter membrane space and low concentrations of protons in the mitochondrial matrix. What would you expect to happen if you suspended the mitochondria in a buffered solution with ADP plus Pi but lacking succinate or any other oxidizable substrate
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Please help me ;(Match each system of equations with the constant that can be multiplied by equation A to create a system of equations that can be solved using the linear combination method. Equation A: 3x 2y = 5 Equation B: 9x + 7y = 34 Equation A: 3x 4y = 5 Equation B: 7x + 8y = 4Equation A: 13x y = 51 Equation B: 12x + 3y = 90
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If vegetables become wilted, they can often bemade crisp again by soaking them in water. However, they may lose a few nutrients duringthis process. Using the concept of diffusion and concentration,state why some nutrients would leave the plantcell. [1]
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EDMENTUM: Consider how suitable your region is for using solar power to generate electricity in terms of weather and latitude (latitude affects the position of the Sun in the sky: the Sun is at a lower angle at higher latitudes and at a higher angle closer to the equator). Speculate on how your region compares to other regions
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Which three glands secrete the protein fluids which are constituents of semen?-seminal vesicles-prostate gland-Cowper's gland-vas deferens-ovum
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Which two lobes of the cerebral hemisphere feature three parallel, longitudinal gyri on their lateral aspect
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Background:there was a tarantula discovered at knightsen school. mr. yurkovich when there as a child, grew up in the area, and still lives nearby. he has never heard of tarantulas being observed at the school before this. tarantulas eat primarily grasshoppers and beetles.question:what will happen to the populations of beetles, now that tarantulas are a new part of their environment? will the population increase or decrease?ignore the name its just my principles
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Read the following sentences from the text. "But some creatures have just a single cell, like an amoeba. They are called unicellular organisms. Other creatures, like us human beings, are collections of cells. These are called multicellular organisms. Multicellular organisms can range in size from brown algae to large animals like elephants and whales, which have trillions of cells. "What can be concluded about cells based on this information?
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(b)Discuss the role of carbohydrate metabolic pathways in regulation of blood sugar levels
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URGENT PLEASEEEEEEE which location most likely contains the youngest fossils?
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Water is less dense as a solid than as a liquid. How does this property typically affect a lake ecosystem in freezing temperatures? A. When the lake is frozen, fish no longer have access to liquid water for oxygen and swimming but do have access to food on the bottom of the lake. B. When the lake is frozen, fish still have access to liquid water for oxygen and swimming but no longer have access to food on the bottom of the lake. C. When the lake is frozen, fish no longer have access to liquid water for oxygen and swimming and no longer have access to food on the bottom of the lake. D. When the lake is frozen, fish still have access to liquid water for oxygen and swimming as well as access to food on the bottom of the lake
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How would you transport the following organisms vibrio spp,neisseria spp. to the laboratory
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Which process( photosynthesis, cellular respiration, both) do algae preform when incubated in the light? in the dark?
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It is not always easy to categorize a particular case of symbiosis. Suppose a certain species of snail is always found living on a certain coral. No one has found evidence that the snail harms the coral, so the relationship is classified as commensalism. How would you go about testing this hypothesis? What kinds of observations might lead to the conclusion that the snail is a parasite, or that it has a mutualistic relationship with the coral?
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Describe the actions of muscles when they contract, and define the terms agonist and antagonist in muscle action.
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If the template strand of dna reads: 3-cgaagcgga -5' what will the mrnatranscript read? *
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