Master Biology with Fun Quizzes & Brain Teasers!

Features of veins: 1 Wide lumen 2) Thin wall 3 tissue in the walls to control blood flow
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What happens when someone turns blue in the face?
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which is not true of smooth muscles?A.) They use peristalsis to move substances through tubesB.) They form structures like blood vessels in the small intestineC.) They quickly become fatiguedD.) They are connected by Gap junctions
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The Permian mass extinction occurred about 248 million years ago, well before humans entered the scene. It was the greatest mass extinction ever recorded in Earth's history. About ninety-five percent of all marine species became extinct as a result of the Permian extinction.Although scientific theories vary, it is believed that _____________________ caused the Permian mass extinction.Group of answer choicesthe start of glaciation and natural climate change.plate tectonics.the introduction of dinosaurs.the human enhanced greenhouse effect
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(Brainlest) What might occur if a cell entered mitosis without completing the s stage of interphase?
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Name components of the urinary system and describe one function for each. Thank you
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Which (TWO) plant types require water that sperm swim through in order to reach the ovules (or eggs) and reproduce through spores (instead of seeds)?*{}Ferns {}Gymnosperms (cone-bearing plants){}Angiosperms (flowering plants){}Mosses
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Question 66A protein is 200 amino acid long.a.) How many codons does it have?b.) How many nucleotides does it have?c.) What is the first amino acid of this protein?
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Hurry brainlest What events occur during interphase ?
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Minimum of 4 sentencesChoose two organelles and describe their function.
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A single phenotype is favored because individuals with its allele have a higher fitness. What form of natural selection does this describe?A. directional selectionB. sexual selectionC. disruptive selectionD. stabilizing selection
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Below is the base sequence for one strand in a short segment of DNA CTG ATC
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I need help with finding the answer to this question number 10
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If intelligence in humans wasdetermined by a single gene, whatwould that mean for the humanpopulation?A. It would have little to no impact.B. People would be one level of intelligence oranother.C Everyone would be much smarter.
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3. Use the pyramid diagram below to help you review what you have read. Arrange the steps in the replication process of the retrovirus in the correct order by placing the letters below next to the numbers on the pyramid.a. DNA is made from viral RNAb. Virus enters cellC. Host cell and provirus reproduce; new virus formsd. Viral DNA (provirus) integrates into host cell's chromosomes1.2.3.4.
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Diesel is the only fuel that is a non-renewable source ofenergy:TRUEFALSE
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What is the dependent variable that impacts the amount of solar energy in a location?A) EquatorB) LatitudeC) LongitudeD) Prime meridian
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Which means that the young are born alive after having been nourished in the female with no egg being produced?A) OviparousB) OvoviviparousC) ViviparousD) Viparous
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Liver cells help clean your blood with a wide range of digestive enzymes that hydrolyze toxic molecules. Which organelle in the cells would be responsible for removing these toxins from the blood?
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Label the diagram of the urinary system using the keywords in the box
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Are the proteins of one specialized cell made in specialized cells of a different type?
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What genotypic ratio is expected in a cross between two heterozygous parents (Pp x Pp)?3 purple: 1 white2 purple: 2 white1:2:11:3
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Explain how the egg and sperm from Mateo's parents, who do NOT have PKU, culd have combined to result in a child (Mateo) who DOES have PKU.Use the terms Meiosis, chromosomes, the PAH gene, egg, sperm, crossing over.
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A window aquarium contains algae and herbivorous snails.Which of the following statements 13 mOslikely true of the system?a) If the algae are removed, the oxygen level will go up.b) If the snails are removed, carbon dioxide will no longer be produced.c) If predators of the snails are introduced, the algal population will grow.d) If the algae are removed, the snails will become filter feeders.e) The level of carbon dioxide is likely to be lower at night than during the day.
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