Master Biology with Fun Quizzes & Brain Teasers!

What is Rh factor? aRed hemoglobin factor, indicating the presence of red blood cells bRhesus factor, another type of antigen on erythrocytes cRed herring factor, a chemical that confuses white blood cells dRheumatoid factor, which indicates the likelihood of contracting Rheumatoid arthritis
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Which of the following organisms contain one cell, but do not contain a nucleolus?A. bacteriaB. algaeC. grassesD. mushrooms
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What did Lister show concerning pathogens?
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Part A which statement is correct regarding changes in populations?- both mutations and natural selections are both random- mutations are not random but natural selection is-neither mutations nor natural selections are not random-mutations are random but natural selection is notPart B read the statements about evolution below which is true??-Evolution happens over a short period of time to all individuals-Evolution can be fast or slow and causes populations to adapt to different environment by choice-A volution is a slow process where the population changes over time-Evolution is a slow change where the individual choose to make changesPart C which statement belong shows an example of fitness in The rocket pocket mouse poputation-The dark my stand out from the light background-The dark mice are better at hiding-There are fewer light mice on the black surface overtime-The light mice had a mutation that made dark micePart D hello natural selection, the species that are most likely to survive are pick an answer better at camouflagebetter trainedbetter at avoiding predatorsbetter adaptedPart E what does allele frequency tell you about a population-The number of alleles each individual has-The number of different individuals in a populationThe number of different alleles in a population The number of different genes in a populationPart F individual organism can adaptTrue, But it has to increase their fitnesssometimes, it depends on where they are located if the adoption is helpful or notfalse, only a population can adaptPart G is dark Colored for an adaptation for the rocket pocket mice? no, it makes them stand out on the light surface decreasing their fitnessyes they can choose to be dark colored on the black surface which increases their fitnessyes, they blend in with the black background increasing their fitnessno, they dont blend in with all surfaces and are not adapted to both environments
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When matter releases energy, what kind of change is occurring?
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Which of the following statements is true about DNA replication?I. DNA Polymerase reads in the 3' to 5' directionII. DNA Polymerase builds in the 3' to 5' directionIII. DNA Polymerase builds in the 5' to 3' directionIV. DNA Polymerase builds the Leading strand away from the replication forkA. III and IVB. I and IIIC. I, III, and IVD. I, II, and IVReset Selection
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1. Which of the following statements BEST defines semipermeablea. Allowing all materials to move in and out freelyb. Maintaining a constant concentration of materials inside the cell membranec. Allowing some materials to pass, while preventing othersd. Preventing the movement of all materials
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what is the answer to this homework question with an explanation please
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a little summary how ultraviolet light could be the answer to the future outbreak ( Two paragraphs).
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Why is osmosis important to the survival of a cell? What did you include in your response?
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Please help me with this?Describe your DNA model. Which part do the straws represent? The pushpins? The paper clips and the black dots you made with the marker?And Observe the two strands of your model. Are they identical, or are they complementary? Explain your answer.
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Characteristics of homo sapiens that are unique to this genus include using tools, burying their dead, andQuestion options:opposable thumbs.formed societies.lack of prehensile tail.hair on their bodies.
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Given the following gene sequence, determine which of the choices would be a frameshift mutation:ATCTAGGTACTAA. ATTAGGTACTAB. ATTTAGGTACTAC. ATCATGGATCTAD. GTCTGGGTGCTG
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Provide the brief overview of the endocrine system , explain briefly how its exerts and effects on its targets cells.
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Help Im having trouble and this is due Tomorrow
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Which of the following is a major difference between somatic cells and gametes in the human body?
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Help Im having trouble and this is due Tomorrow
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What does it mean if a molecule is moved against the concentration gradient?
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astronauts do not measure the distance between planets with kilometers
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When a cell grows, it must produce more cell membrane material. Where is the material for the cell membrane produced and how does it finally get to the cell membrane?
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Changes in DNA sequences that affect genetic information are known asGroup of answer choicestranslationsmutationstransformationsreplications
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Place the steps of translation of protein synthesis in order.Translation1 mRNA attaches to the ribosome2 tRNA carries its specific amino acid to the ribosome.3 Protein chain continues to grow as each tRNA brings in its aminoacid and adds it to the chain.4 tRNA's attach to free amino acids in the cytoplasmic "pool" ofamino acids.5 tRNA "delivers" its amino acid based on complementary pairing*::: a of a triplet code (anticodon) withmRNA.the triplet code (codon) of the6 Enzyme "hooks" the amino acid a peptide bond to the last one in the chain forming
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Tonicity of right side:How you know:Could you simplify the answers to a grade 12 level? Please and thank you.
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A male rabbit that is homozygous dominant for long hair over short hair H and heterozygous for black fur over gray fur B is crossed with a female rabbit that is heterogeneous for both traits. Show the punnet square and the expected offspring and their proportions ( ratios and percentages for both genotype and phenotype)
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