Biology Questions

The 9:3:3:1 ratio of the offspring in Gregor Mendel’s dihybrid crosses led him to conclude that _____________________________. 1)some of the alleles were more abundant in the population of garden peas than others 2)the inheritance of different traits are connected to each other 3)some traits are dominant over other traits 4)the inheritance of one trait does not impact the inheritance of another trait
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A single carbon atom can form a maximum of how many single covalent bonds
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1. If a pea plant’s alleles for height are tt, what is true of its parents? (1 point) A.) Both Parents are tall. B.)Both parents are short. C.)Both parents contributed a recessive allele. D.)Both parents contributed a dominant allele. 2. A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate, (1 point) A.)the offspring will be of medium height B.)all of the offspring will be tall C.)all of the offspring will be short. D.)the offspring can be tall or short
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At what time of the year are most of the animals living in a temperate forest likely to reproduce? (1 point) In fall or winter to take advantage of food that grew in summer Generally in winter since food can be stockpiled and adults can rest At any time during the year since food is equally available all year In spring and summer to coincide with the growing season
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In snapdragons, there is one allele that produces red flowers and another allele that produces white flowers. Neither allele is dominant and heterozygous individuals have pink flowers. A plant breeder decides to cross a red flowered snapdragon with a pink flowered snapdragon. What percentage of the offspring do you expect will have red flowers?
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Some nutrients and other types of particles can be taken into a cell when the cell's plasma membrane encloses the particles and pinches off, forming a free-floating vesicle inside the cell. A lysosome containing digestive enzymes then fuses with the vesicle. Which term best classifies the uptake of such particles by the cell? simple diffusion endocytosis exocytosis osmosis
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In the case of cancer, uncontrolled cell division is a problem because it A. causes excessive white cell production. B. interferes with other cell replication. C. lowers t-cell and lymphocyte production. D. requires unreasonable hydration rates.
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____ energy gets converted to ____ energy through photosynthesis.A.Radiant; chemicalB.Chemical; radiantC.Radiant; mechanicalD.Chemical; mechanical
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A tall pea plant could _______. Select one: a. have the phenotype of Tt b. have the genotype of tall c. have the phenotype of tt d. have the genotype of Tt
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a volcanic eruption takes place under the ocean. Huge waves crash against the shores and destroy houses of people. Which earth systems interact during this process? A. geosphere, atmosphere, and biosphere B. hydrosphere, geosphere, and biosphere C. atmosphere, geosphere, and cryosphere D. biosphere, cryosphere, and hydrosphere
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What is the name of the cell organelle that is shaped like a flattened disc, contains stroma and stacks of thylakoids, and is the site of photosynthesis?
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Which statement describes the relationship between chromosomes, genes, and alleles? A. Alleles transfer genes to the appropriate location within a chromosome. B. Alleles are sites on a chromosome that genes bind to. C. Chromosome's have mutated parts called genes. These mutations are caused by alleles. D. A chromosome's specific section is called a gene. Alleles are variations of a gene.
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If the heart becomes damaged or weakened, how will this affect the body’s systems? A. The muscular system will strengthen the heart. B. Only the nervous system will be unable to function. C. The circulatory system will not function well, which will affect all other body systems. D. Only the circulatory and respiratory systems will be affected.
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A certain plant has a color that can range from green to yellow. Some plants are very green, and some are very yellow, but most are in between. What is most likely true about this trait? A. The color is a Mendelian trait. B. There are only two alleles for color. C. Being yellow is a recessive trait. D. There are several genes that control the color.
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The cell membrane of a red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Since other substances are blocked from coming in, this membrane is called A. perforated. B. semi-permeable. C. non-conductive. D. permeable.
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5. The circulatory system works with which other body system to supply the body’s cells with the nutrients they need? (1 point) • Do not choose • the digestive system • the integumentary system • the muscular system
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Which are true about forests? Choose all that apply. I. They are home to one-half of the world's people II. Traditional medicine, used by most of the world, comes from forests, including rainforests III. Chemicals from old-growth forests are used to make most medicines IV. Forests are habitat for two-thirds of terrestrial species
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Looking at a cell under a microscope, you note that its a prokaryote. How do you know? a. the cell lacks cytoplasm b. the cell lacks a cell membrane c. the cell lacks a nucleus d. the cell lack genetic material
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