LSUE BIOLOGY 1001 FINAL EXAM, Exams of Nursing

Download LSUE BIOLOGY 1001 FINAL EXAM and more Exams Nursing in PDF only on Docsity! 1 | P a g e LSUE BIOLOGY 1001 FINAL EXAM 2024- 2025 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|NEWEST|GUARANTEED PASS |LATEST UPDATE Which of the following structures is the first to emerge from the germinating seed of a edict such as the garden bean? A) the embryonic shoot hook B) cotyledons C) the embryonic root D) the shoot sheath C) the embryonic root Which of the following is a disadvantage of cloning as a propagation technique? A) Cloning produces monocultures that can potentially be wiped out by a single disease B) Cloning is more expensive and more difficult than growing from seeds C) Cloning is time consuming, with slow results D) Cloned organisms are dangerous and unpredictable A) Cloning produces monocultures that can potentially be wiped out by a single disease Which of the following cells provide flexible support to the growing parts of plants? A) collenchyma cells B) sieve tube elements C) sclerenchyma cells D) parenchyma cells 2 | P a g e A) collenchyma cells Which of the following is a function of fruits? A) Production of food for the developing embryo B) Pollen dispersal C) Seed dispersal D) Attracting pollinators C) Seed dispersal A mature ovary, specialized as a vessel that houses a protects seeds, is a A) cotyledon B) seed coat C) ovule D) fruit E) seed D) fruit Which of the following substances, by providing strength, allows sclerenchyma cells to provide support and play a role analogous to that of an animals skeleton? A) lignin B) sucrose C) starch D) chlorophyll A) lignin Bark consists of A) functioning xylem, secondary phloem, cork cambium, and cork B) secondary phloem, cork cambium, and cork C) cork only D) secondary xylem and cork E) cork cambium and cork B) secondary phloem, cork cambium, and cork How does the sperm of an angiosperm reach the egg? A) by actively swimming down through the style to the egg B) via the pollen tube that grows from the ovule to reach the pollen grain on the stigma 5 | P a g e D) terrible declines in agricultural productivity....world wide distraction of DDT E) all of the choices are correct A) dramatic increases in crop yields...the evolution of pest resistance Which of the following is a characteristic of the chaparral biome? A) dense, broadleaf shrubs B) low amounts of rainfall at unpredictable periods throughout the year C) many plants with seeds that need fire to germinate D) animal species limited to lizards and snakes C) many plants with seeds that need fire to germinate Which of the following environmental factors usually has the greatest direct effect on an organism's rate of water loss by evaporation? A) Soil type B) Wind C) Fires, hurricanes, and tornadoes D) Barometric pressure B) Wind Rachel Carson's book, Silent Spring, deals with the A) All of the choices are correct B) Environmental effects of pesticides C) Effects of lynx predations on snow hare populations D) Destruction of polar habitats caused by global warming E) Fate of tropical rain forests B) Environmental effects of pesticides The adaptations of pronghorns A) All of the choices are correct B) To open country could be a disadvantage in a densely forested environment C) Included a reflective coat, an inability to find small pools of water, and chemical defenses against most predators D) To open plains and shrub deserts of North America have helped them spread to nearly every continent E) Demonstrate that meeting the demands of local environmental conditions helps organisms extend their ranges to other types of environments 6 | P a g e B) To open country could be a disadvantage in a densely forested environment The major reason for tropical deforestation is A) hurricane destruction of large regions B) people clearing forests to open up land for agriculture C) governments clearing forests to build cities D) natural succession as global warming occurs B) people clearing forests to open up land for agriculture Species in widely separated biomes often appear to display similar characteristics because of A) convergent evolution B) coevolution C) mutations D) evolutionary drift E) speciation A) convergent evolution Shrublands in California, United States are called_____. A) Savanna B) Chaparral C) Prairie D) Brushes E) Bushes B) Chaparral Treeless biomes are treeless primarily because A) there is a lack of water or the water is frozen B) there is no source of seed dispersal C) trees are dependent upon the animals for support D) there is limited sunlight and limited water E) trees cannot withstand hot temperatures or below freezing cold A) there is a lack of water or the water is frozen All of the following affects the distribution of biomes EXCEPT A) global wind circulation B) distance above the sea level C) latitude D) soil type E) climate 7 | P a g e soil type Cancer is not usually inherited because A. the chromosomal changes in cancer are usually confined to somatic cells. B. the cancerous cells usually interfere with the ability to produce gametes. C. the causes of cancer are not usually genetic. the chromosomal changes in cancer are usually confined to somatic cells. A benign tumor differs from a malignant tumor because a)A.Benign tumors arise by transformation B.Benign tumors will not kill you C.Cells of benign tumors do not metastasize. Cells of benign tumors do not metastasize. During which stage of meiosis do synapsids and crossing over occur? a)Prophase b)metaphase c)Prophase I d)anaphase Prophase I Which of the following statements regarding Down syndrome is false? A)Down syndrome is the most common serious birth defect in the United States. B)People with Down syndrome usually have a shorter life span than normal. C)Trisomy 21 is the cause of Down syndrome. D)Down syndrome is least likely to be seen in the infants of mothers over 40. Down syndrome is least likely to be seen in the infants of mothers over 40 Which of the following occurs during interphase? A. Chromosomes line up in the middle of the cell B. DNA replicates C. Chromosomes pull away from the equator of the cell D.Cell growth and duplication of the chromosomes Cell growth and duplication of the chromosomes 10 | P a g e A) identical chromosomes, but different genes B) identical genes but different chromosomes C) the same combination of traits, but different genes D) a similar but not identical combination of genes D) a similar but not identical combination of genes Which of the following is a feature of plant cell division that distinguishes it from animal cell division? A) formation of a cell plate B) formation of a cleavage furrow C) lack of cytokinesis D) production of four (rather than two) new cells per mitotic division A) formation of a cell plate Looking into your microscope, you spot an unusual cell. Instead of the typical rounded cell shape, the cell has a very narrow middle separating two bulging ends. It sort of looks like the number 8! Then you realize that this cell is A) undergoing cytokinesis B) in the S phase of interphase. C) in the G1 phase of interphase. D) in the G2 phase of interphase. E) about to undergo mitosis. A) undergoing cytokinesis Karyotyping A) shows chromosomes as they appear in metaphase of meiosis II B) can reveal alterations in chromosome number C) examines points of crossing over D) reveals the presence of cancerous genes B) can reveal alterations in chromosome number At a chiasma, two____are attached to each other A) homologous or non sister chromatids B) homologous or sister chromatids 11 | P a g e C) non homologous chromosomes D) daughter cells A) homologous or non sister chromatids Asexual reproduction requires____individuals(s) A) 0 B) 1 C) 2 D) 3 B) 1 Mendel's law of independent assortment states that A) chromosomes sort independently of each other during mitosis and meiosis B) independent sorting of genes produces polyploid plants under some circumstances C) each pair of alleles segregates independently of the other pairs of alleles during gamete formation C) each pair of alleles segregates independently of the other pairs of alleles during gamete formation Which of the following statements regarding genetic testing is false? A) genetic testing before birth requires the collection of fetal cells B) carrier testing helps determine if a person carries a potentially harmful disorder C) the screening of newborns can catch inherited disorders right after birth D) most human genetic diseases are treatable if caught early D) most human genetic diseases are treatable if caught early All the offspring of a cross between a black eyed mendelian and an orange eyed mendelian have black eyes. What is the expected phenotypic ration of a cross between two orange eye mendelians? A) 3 black eye: 1 orange eye B) 0 black eyed: 1 orange eyed C) 1 black eyed: 3 orange eyed D) 1 black eyed: 0 orange eyed B) 0 black eyed: 1 orange eyed How is sex determined in most ants and bees? A) by the XY system B) by the ZW system C) by the number of chromosomes D) by the size of the sex chromosomes C) by the number of chromosomes 12 | P a g e Which of the following terms refers to a situation where a single phenotypic character is determined by the additive effects of two or more genes? A) incomplete dominance B) codominance C) pleiotropy D) polygenic inheritance D) polygenic inheritance Amniocentesis and chorionic villus sampling allows for ____ and ____ of the fetus so that it can be tested for abnormalities A) imaging ...karyotyping B) sexing.... imaging C) karyotyping... biochemical testing D) direct observation.. biochemical testing D) direct observation.. biochemical testing A woman has been trying to conceive for several years, unsuccessfully. At a fertility clinic, they discover that she has blocked Fallopian tubes. Using modern technologies, some of her eggs are removed, fertilized with her husband's sperm, and implanted into her uterus. The procedure is successful, but the couple discovers that their son is color blind and the blood type O. The woman claims that the child can't be theirs since she has blood type A and her husband has blood type B. Also, neither parent is color blind, although one grand parent (the woman's father) is also color blind. As a genetic counselor, you would explain to the parent that A) the eggs must have been accidentally switched, since the baby's blood type has to match one of his parents B) each parent could have contributed one recessive allele, resulting in type O blood C) the eggs must have been accidentally switched, since a type A parent and a ty B) each parent could have contributed one recessive allele, resulting in type O blood According to scientist, about what percentage of men currently living in Central Asia may be descended from the Mongolian ruler Genghis Khan? A) 4% B) 8% C) 25% D) 40% B) 8% 15 | P a g e Which of the following statements regarding a DNA double helix is always true? A) the amount of adenine is equal to the amount of uracil, and the amount of guanine is equal to the amount of cytosine B) the amount of adenine is equal to the amount of guanine, and the amount of thymine is equal to the amount of cytosine C) the amount of adenine is equal to the amount of cytosine, and the amount of guanine is equal to the amount of thymine D) the amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine D) the amount of adenine is equal to the amount of thymine, and the amount of guanine is equal to the amount of cytosine Experiments have demonstrated that the "words" of the genetic code (the units that specify amino acids) are A) two nucleotides sequence B) sequences of anticodon C) three nucleotides sequences D) nucleotides sequences of various lengths E) single nucleotides C) three nucleotides sequences Hiv does the greatest damage to A) pancreatic cells B) white blood cells C) the adrenal glands D) red blood cells E) nervous tissue B) white blood cells A physical or chemical agent that changes the nucleotide sequence of DNA is called a A) codon B) anticodon C) mutagen D) terminator E) transposon C) mutagen 16 | P a g e Which of the following takes place during translation? A) the conversion of genetic information from the language of nucleic acids to the language of proteins B) the conversion of genetic information form DNA nucleotides into RNA nucleotides C) the conversion of genetic information from the language of proteins to the language go enzymes D) DNA replication A) the conversion of genetic information from the language of nucleic acids to the language of proteins The monomers of DNA and RNA are A) monosaccharides B) nucleotides C) fatty acids D) nucleic acids B) nucleotides The transfer of genetic information from DNA to RNA is called A) translation B) transcription C) initiation D) elongation B) transcription Conjugation between a bacterium that lacks an F factor (F-) and a bacterium that has an F factor on its chromosome (F+) could produce which of the following results? A) The F- bacterium ends up carrying one or more plasmids from the F+ bacterium; the F+ bacterium in unchanged B) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F- bacterium, and the F- bacteria ends up with an unaltered chromosome C) F- and F+ bacteria became genetically similar D) The F+ bacterium ends up with a recombinant chromosome that carries some genes from the F- bacterium, and the F- bacterium ends up with a chromosome that lacks those genes E) The F- bacterium ends up with a recombinant chromosome that carries some genes from the F+ bacterium, and the F+ bacterium ends up with an unaltered chromosome 17 | P a g e E) The F- bacterium ends up with a recombinant chromosome that carries some genes from the F+ bacterium, and the F+ bacterium ends up with an unaltered chromosome Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component? A) RNA-DNA-RNA-protein B) DNA-RNA-protein C) protein-RNA-DNA D) DNA-tRNA-mRNA-protein B) DNA-RNA-protein Which of the following is a function of a tRNA molecule? A) recognizing the appropriate anticodons in mRNA B) ransferring nucleotides to rRNA C) helping to translate codons into nucleic acids D) joining to only one specific type of amino acids D) joining to only one specific type of amino acid The "one gene one polypeptide" theory states that A) the synthesis of each gene is catalyzed by one specific enzyme B) the synthesis of each enzyme is catalyzed by one specific gene C) the function of an individual gene is to dictate the production of a specific polypeptide D) the function of each polypeptide is to regulate the synthesis of each corresponding gene C) the function of an individual gene is to dictate the production of a specific polypeptide When a T2 bacteriophage infects anEscherichia coli cell, which part of the phage enters the bacterial cytoplasm? A) the whole phage B) only the RNA C) only the DNA D) the protein "headpiece" and its enclosed nucleic acid C) the only DNA Imagine that you are studying a very large population of moths that is isolated from gene flow. A single gene controls wing color. Half of the moths have white spotted wings (genotype WW or Ww) and half of the moths have plain brown wings (ww). There are no new mutations, individuals mate randomly, and there is no natural selection on wing color. How will p, the frequency of the dominant allele, change 20 | P a g e C) a harmful recessive allele in a sexual, polyploid population D) any harmful allele, regardless of the system of inheritance in a population A) a harmful allele in an asexual, haploid population Large antlers in male elk, which are used for battles between males, are good example of a trait favored by A) intersexual selection B) intersexual selection C) disruptive selection D) stabilizing selection B) intersexual selection Aristotle believed that A) All of the choices are correct B) An individual's use of a body part causes it to further evolve C) species are fixed (permanent) and perfect D) species evolve through natural selection and other mechanisms E) the best evidence for change within species is seen in fossils C) species are fixed (permanent) and perfect Which of the following represents a pair of homologous structures? A) the wing of a bat and the scales of a fish B) the wing of a bat and the flipper of a whale C) the antennae of an insect and the eyes of a bird D) the wing of a bat and the wing of a butterfly B) the wing of a bat and the flipper of a whale Humans evolved with the disappearance of tail, despite the presence of tailbone. The tail in human is a A) Biochemical structure B) Vestigial structure C) Homologous structure D) Analogous structure E) All of the choices B) Vestigial structure In what rocks, fossils are found? A) Lava B) Metamorphic C) Sedimentary 21 | P a g e D) Magma E) Igneous C) Sedimentary Homologous structures such as the bones in wings, flippers, and arms are most closely concerned with A) comparative biochemistry B) anatomical similarity C) the fossil record D) biogeography E) comparative embryology B) anatomical similarity When body temperature is too high, which which of the following occurs? A) The brain sends out distress signals B) Blood vessels in the skin dilate C) Capillaries contract D) The internal lining of the intestine increases in surface area Which of the following is most likely to be responsible if, when your blood sugar level rises, the level of sugar goes back down? A) the use of the sugar for energy by your cells B) a homeostatic mechanism based on negative feedback C) type II diabetes D) a homeostatic mechanism based on positive feedback B) a homeostatic mechanism based on negative feedback Which of the following is a major category of animal tissue? A) epithelium B) heart C) lymph D) biceps A) epithelium 22 | P a g e Which of the following is part of the immune system? A) Bone marrow B) Liver C) C) Which of the following is a type of connective tissue? A) plasma B) adipose tissue C) epithelial tissue D) muscle tissue B) adipose tissue An organ system consists of A) a collection of cells and tissues B) organs that collectively perform a vital body function C) a collection of similar cells D) blood, lymph, and the body fluid E) a group of coordinated tissues B) organs that collectively perform a vital body function Homeostasis A) All of the choices are correct B) Results form hormone imbalance C) Occurs when the internal environment changes to match the external environment D) Is the way the internal environment influences the external environment E) Is the maintenance of a relatively constant internal state E) is the maintenance of a relatively constant internal state An organ represents a higher level of structure than the tissue composing it and performs functions that the tissues cannot perform alone. This is an example of the principle of A) emergent properties B) cellular regulation