Test Bank Answers PDF

Test Bank Answers Friday, December 6, 2024 11:16 AM During transcription The male gonad is the________, and Qu...

Test Bank Answers Friday, December 6, 2024 11:16 AM During transcription The male gonad is the________, and Question 1 the female gonad is the________. DNA is transcribed into amino acids. 0.5 / 0.5 pts ovary; testis A population that is growing at a rapid rate RNA is transcribed into amino acids. would have an age-structure diagram with vagina; penis a higher number of reproductive individuals compared to postreproductive DNA is transcribed into mRNA. individuals but very few individuals in the prereproductive category. testis; uterus mRNA is transcribed into tRNA. a higher number of postreproductive and reproductive individuals compared to prereproductive individuals. testis; ovary rRNA is transcribed into tRNA. a higher number of prereproductive and reproductive individuals compared penis; vagina Question 2 to postreproductive individuals. 0.5 / 0.5 pts According to Chargaff's data,________ must pair with________, and________ must pair with________. Question 2 an equal number of prereproductive and reproductive individuals. 1 / 1 pts A; G; T; C The inner lining of the uterus is the Correct! more postreproductive individuals compared to prereproductive individuals. cervix. A; T; C; G Question 2 endometrium. 0.5 / 0.5 pts A; C; G; T Emperor penguins defend an area around their nests. Their territory encompasses a complete circle around the nest with approximately a 0.5 m placenta. radius. If each nesting penguin has this same size and shape territory, what C; T; G; A type of distribution will these animals exhibit? fimbria. clumped G; U; A; C chorion. random Question 3 0.5 / 0.5 pts Question 3 DNA is shaped like a twisted ladder. The rungs of the ladder 1 / 1 pts are composed of________ while the sides of the ladder are dense During the first half of the human composed of________. ovarian cycle, Correct! uniform follicle-stimulating hormone (FSH) nitrogenous bases; sugar-phosphate molecules promotes the development of estrogen-secreting follicles. independent sugar-phosphate molecules; nitrogenous bases luteinizing hormone (LH) promotes the Question 3 development of a progesterone- sugar molecules; phosphate-nitrogenous bases 0.5 / 0.5 pts secreting corpus luteum. Schools of parrot fish tend to remain within close proximity to coral reefs for protection from predators and for easy access to food sources. What type of phosphate molecules; sugar-nitrogenous bases distribution does this represent? the corpus luteum reaches its maximum Correct! size and progesterone output, then sugar-nitrogenous bases; phosphate molecules shrinks. clumped Question 4 there are high levels of both estrogen 0.5 / 0.5 pts random and progesterone. The term semiconservative refers specifically to Correct! dense ovulation occurs on each consecutive day. DNA replication. uniform Question 4 1 / 1 pts translation. The second half of the ovarian cycle is termed the________ phase. independent transcription. ovulatory The fish are clumped around food sources and crevices for hiding from predators. mitosis. follicular Question 4 0.5 / 0.5 pts meiosis. What is meant by an organism's biotic potential? luteal The rate at which the population grows. Question 5 0.5 / 0.5 pts menstrual tRNAs carrying the correct amino acid recognize the proper codons on the mRNA because The number of offspring that an organism produces over its entire life span. Correct! menopausal the anticodon of the tRNA hydrogen binds to the codon of The age at which an organism reaches sexual maturity. the mRNA by complementary base pairing. Question 5 1 / 1 pts The number of individuals in the prereproductive stage. Which of these is mismatched? the codon of the tRNA binds to the anticodon of the ribosome by complementary base pairing. Correct! ovulation - luteinizing hormone (LH) peaks the anticodon of the tRNA carries the correct amino acid. The maximum rate of population growth with unlimited resources. the codon of the tRNA binds to the anticodon of the ribosome by complementary base pairing. Correct! ovulation - luteinizing hormone (LH) peaks the anticodon of the tRNA carries the correct amino acid. The maximum rate of population growth with unlimited resources. menstruation - follicle-stimulating Question 5 hormone (FSH) peaks the amino acid binds to the anticodon of the mRNA and brings the correct tRNA with it. 0.5 / 0.5 pts Which of the following populations has the greatest biotic potential? secretory phase - progesterone peaks the codon of the mRNA binds the correct amino acid, and the Population A in which females start to reproduce at 1 year and produce 2 tRNA stabilizes this interaction. offspring each year. menstruation - progesterone declines Question 6 Population B in which females reach sexual maturity in 6 months and produce 0.5 / 0.5 pts 1 offspring each 12-month reproductive cycle. proliferative phase - estrogen levels rise There are three steps that are required for DNA replication. The first step, unwinding, is accomplished by the enzyme Question 6 1 / 1 pts helicase. Population C in which males reach sexual maturity in just 3 months. A birth control pill works by Correct! DNA polymerase. Population D in which individuals reach sexual maturity in 6 months and produce 5 offspring each year. inhibiting FSH and LH production. RNA polymerase. Population E in which individuals produce 5 offspring starting at 5 years of age. making the woman's reproductive tract DNA ligase. toxic to sperm. Question 6 stimulating FSH and LH production. 0.5 / 0.5 pts topoisomerase. Which of the following is an example of exponential growth? destroying the endometrium. Question 7 2,000→2,000→2,000 0.5 / 0.5 pts If an organism's DNA contains 18% adenine nucleotides, what immunizing the woman against human percentage of its DNA is composed of guanine nucleotides? 1,500→1,600→1,700 chorionic gonadotropin (hCG). 9% 1,500→1,550→2,010 Question 7 1 / 1 pts 18% Since plant sperm are nonflagellated, 1,000→1,500→2,000 how do they reach the ovule from the 32% stigma? 2,000→1,500→1,000 the sperm swim in water 64% Question 7 the sperm are delivered by a pollen 100% 0.5 / 0.5 pts tube Question 8 If a population of 200 squirrels has a 10 percent growth rate each year, how 0.5 / 0.5 pts many individuals will there be in the population after 3 years (assuming that no If an organism's DNA contains 28% adenine nucleotides and deaths occur during this period)? the sperm are carried on air currents 22% guanine nucleotides, what percentage of its DNA is composed of cytosine nucleotides? approximately 250 the sperm delivered by insects 28% approximately 266 the ovules are delivered to the stigma 22% 56% approximately 300 Question 8 1 / 1 pts Which of the following is an incorrect approximately 350 match of structure to function? 44% sepal - protection of flower 11% approximately 400 filament - produces pollen By Chargaff's rules, the amount of G=C, so the DNA is also 22% cytosine. Question 8 0.5 / 0.5 pts Question 9 All of the following are true of BOTH logistic growth and exponential growth petal - attracts pollinator 0.5 / 0.5 pts except DNA replication is called semiconservative because they both have a lag phase. ovary - contains female gametophyte one of the resulting DNA molecules is comprised of entirely old DNA and one is comprised of entirely new DNA. they both have an exponential growth phase. stigma - allows pollen to adhere each resulting DNA molecules is comprised of one new DNA strand and one old strand. they both have a stable equilibrium phase. Question 9 1 / 1 pts The microspores develop into pollen both of the resulting DNA molecules are comprised of entirely they are both a type of population growth. grains in the new strands of nucleotides. anther. no extra nucleotides are incorporated into the replicated DNA they are influenced by resource availability. molecules. filament. Question 9 the sequence of nucleotides in one strand is conserved, 0.5 / 0.5 pts whereas the new DNA molecule consists of a unique When a population reaches the stable equilibrium phase, this is considered stigma. sequence of nucleotides. Question 10 the carrying capacity of the environment. style. whereas the new DNA molecule consists of a unique When a population reaches the stable equilibrium phase, this is considered stigma. sequence of nucleotides. Question 10 the carrying capacity of the environment. style. 0.5 / 0.5 pts What chemical force must be overcome in order to separate the two DNA strands during replication? logarithmic growth. ovary. hydrophobic interactions Question 10 1 / 1 pts exponential growth. The products of double fertilization in covalent bonds the________ are a 2n________ and a 3n________. the minimum number of individuals that the environment can sustain. ionic bonds ovary; zygote; endosperm the slow growth stage. phosphodiester bonds ovary; endosperm; zygote Correct! Question 10 0.5 / 0.5 pts Jacob is studying a population of wrens in Michigan. Over several years, he anther; zygote; endosperm hydrogen bonds notices that the population always stabilizes at around 45 individuals. Which of the following is a possible explanation for Jacob's observation? Question 11 anther; endosperm; zygote 0 / 0.5 pts population is at maximum density RNA differs from DNA because RNA stigma; endosperm; zygote is double-stranded, whereas DNA is not. death rate is higher than birthrate Question 11 1 / 1 pts is single-stranded, whereas DNA is double-stranded. Plants undergo an alternation of exponential growth generations. This means that the diploid________ produces spores, is never single-stranded, whereas DNA may or may not be. Correct! which develop into the haploid________. can self-replicate, whereas DNA replication requires enzymes. limited resources to support additional birds sporophyte; gametophyte is replicated along with DNA but does not require strand slow lag phase separation like DNA. gametophyte; sporophyte The carrying capacity is the maximum number of individuals that the Question 12 environment can sustain. sporophyte; seeds 0.5 / 0.5 pts Which base is found in DNA, but not in RNA? Question 11 0.5 / 0.5 pts cytosine flowers; gametophyte During a summer with lots of rain, the vegetation grew lush and the white- footed mouse populations increased due to increases in food availability. However, the next two summers were record drought years and food became uracil sporophyte; flowers increasingly scarce. Over these two years, the population size of the mice decreased due to increased competition for access to food. This increased Question 12 competition is an example of 1 / 1 pts Plants undergo an alternation of thymine a density-independent factor. generations. The haploid________ produces gametes adenine that fuse to produce a new a negative growth rate. diploid________. guanine sporophyte; gametophyte a density-dependent factor. Question 13 gametophyte; sporophyte 0.5 / 0.5 pts an opportunistic population. If RNA polymerase malfunctions, one of the subunits of rRNA will not be transcribed from DNA. gametophyte; flower logistic growth. amino acids will not be joined to their tRNA. flowers; gametophyte Competition is an example of density-dependent competition because the percentage of the population affected increases as the density of the mRNA cannot bind to rRNA. population increases. sporophyte; flower Question 12 0.5 / 0.5 pts mRNA will not be formed. Question 13 Honeybees have been declining at dramatic rates in the last few years. Colony 1 / 1 pts collapse disorder has been linked to a virus and results in hives completely A flower that is bisexual contains mRNA cannot copy itself. emptied of bees among both wild populations and domestic hives. Recently, scientists have suggested that infected bees may contaminate flowers that only carpels. Question 14 they visit and thus spread the disease. This is an example of a 0.5 / 0.5 pts DNA serves as a template for the formation only stamens. of________ during a process called transcription. clumped distribution. rRNA extra sepals. density-dependent factor. mRNA both stamens and carpels. random factor. tRNA anthers but no filaments. density-independent factor. both rRNA and mRNA Question 14 1 / 1 pts biotic potential. In a eudicot seed, the zygote becomes rRNA, mRNA and tRNA. the________, while the________ is Question 13 derived from the endosperm. 0.5 / 0.5 pts both rRNA and mRNA Question 14 1 / 1 pts biotic potential. In a eudicot seed, the zygote becomes rRNA, mRNA and tRNA. the________, while the________ is Question 13 derived from the endosperm. Question 15 0.5 / 0.5 pts 0.5 / 0.5 pts Which of the following is an example of a density-dependent factor? embryo; seed coat DNA replication makes a(n)________ copy of the DNA strand, Correct! while transcription makes a(n)________ copy of the DNA strand. parasite infection cotyledons; embryo mRNA; DNA a wildfire embryo; cotyledon DNA; mRNA a tornado embryo; stored food DNA; tRNA flooding stored food; seed coat mRNA; tRNA mRNA; rRNA freezing temperatures Question 15 1 / 1 pts Question 14 A fleshy fruit is more likely to use which Question 16 0.5 / 0.5 pts of the following methods of seed 0.5 / 0.5 pts Which of the following is a characteristic of equilibrium species? dispersal? Which of the following transfers amino acids present in the Correct! cytoplasm to the ribosomes? short life span rRNA eaten by animals and seeds passed through feces short time to reach sexual maturity tRNA blown by wind production of many offspring mRNA stuck to fur of mammal and carried little or no parental care DNA fruit bursts when mature, spreading seeds outward logistic growth protein drop and remain near parent plant Question 15 0.5 / 0.5 pts Question 17 Different populations living in the same geographical region is a(n) Question 16 0.5 / 0.5 pts 1 / 1 pts Which of the following processes takes place in the organism. Gametophytes of flowering plants are cytoplasm? produced within Correct! DNA replication population. a flower. transcription community. a cone. intron removal ecosystem. a leaf. translation biosphere. primary mRNA splicing a stem. An organism is an individual living thing; a population is organisms of the same species living in an area; a community is different populations living in the same geographical region; an ecosystem is all abiotic and biotic a root. Question 18 factors in a particular geographical region; and the biosphere is the 0.5 / 0.5 pts portion of the Earth where living organisms are found. The sequence of the mRNA that would result from Question 17 1 / 1 pts transcribing a segment of a DNA template strand with the Question 16 bases AATAGCGTA would be 0.5 / 0.5 pts What is the site of double fertilization? A researcher is studying interactions between caribou and their wolf predators. Correct! AUGCGAUUA. This is an example of________ ecology. ovule population AUUAGCGUA. ovary community UACGCUAAU. embryo sac UUAUCGCAU. ecosystem anther ATGCGATTA. biosphere Question 19 0.5 / 0.5 pts stigma demographic The two DNA strands must be separated before Correct! Question 17 both DNA replication or transcription can occur. 0.5 / 0.5 pts During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. Prior to this event, this species DNA replication only. did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. When the butterflies initially arrived on the island, they did not have to transcription only. compete for food or space. What type of population growth did they likely exhibit?  blown onto a barrier island in southern Florida. Prior to this event, this species DNA replication only. did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. When the butterflies initially arrived on the island, they did not have to transcription only. compete for food or space. What type of population growth did they likely exhibit? translation only. logistic both transcription and translation. exponential Question 20 0.5 / 0.5 pts Genetic information flows from ________ to _________ to __________. This is called the central dogma of molecular density-dependent biology. Correct! density-independent DNA to RNA to protein. logarithmic RNA to DNA to protein. Question 18 DNA to protein to RNA. 0.5 / 0.5 pts The butterflies and flowers living on a barrier island in Florida would be considered an example of a(n) RNA to protein to DNA. organism. protein to RNA to DNA. population. community. ecosystem. biosphere. Question 19 0.5 / 0.5 pts If the fishing village of Hopkins, Belize, is experiencing a decreasing population, what should they do if they wish to reverse this trend and see the greatest amount of population growth in the next 10 years? increase the number of individuals in the prereproductive stage increase the number of individuals in the postreproductive stage increase the number of individuals in the reproductive stage increase the amount of medical care available for its residents increase the economic opportunities for the members of the community Question 20 0.5 / 0.5 pts Which of the following is a community? a group of walrus on a beach hummingbirds at a feeder trout and the lake they inhabit squirrels and the oak trees they live in a herd of elephants in the Namib Desert Communities are comprised of more than one species. Squirrels and oak trees represent two different species that make a community. Question 21 0.5 / 0.5 pts Which of the following is an example of an ecosystem? zebras and the lions that prey on them a coral reef together with all the fishes and invertebrates living in and around it flowering plants and all the insects and birds that pollinate them male prairie chickens competing for access to mates rabbits eating carrots An ecosystem includes all species interacting with one another and the abiotic factors in their environment. Question 22 0.5 / 0.5 pts Which of the following communities is the least diverse? 15 lions, 100 zebras, 80 giraffes 50 squirrels, 75 oak trees, 60 maple trees 4 crab spiders, 76 goldenrod, 60 echinacea 40 bass, 60 minnow, 55 blue gill 5 elm trees, 7 beech trees, 6 birch trees Question 23 0.5 / 0.5 pts Ecological succession is a change in communities caused by human activities. a stable community that forms after a change. an orderly process of change in the community of organisms. what happens to a cultivated field every year that crops are planted. competition between opportunistic and equilibrium species. Community species composition and diversity change over time in a relatively orderly manner. Question 24 0.5 / 0.5 pts The first pioneer species to appear in an area undergoing secondary succession is an equilibrium species. long-lived. able to produce numerous offspring. a secondary consumer. slow to reach sexual maturity. Question 25 0.5 / 0.5 pts Which of the following is an example of primary succession? new growth in a forest after a forest fire regrowth and recolonization on Mt. St. Helens in areas covered with rock and lava a wheat field that is not allowed to grow wild regrowth of vegetation in an area covered by a mudslide after flooding colonization of an isolated island by a population of long-horned beetles Question 26 0.5 / 0.5 pts Which of the following would be considered a mutualistic relationship? Correct! Some species of crabs decorate their shells with sea anemones and other corals. These "decorations" help camouflage the crab, and the movement of the crab from one area to the next exposes the corals and anemones to different sources of food. Some spiders do not build webs, but live in the web of another species. When a prey item is caught in the web, the non-web building spider will sneak in and steal the prey. A praying mantis hunts and eats a fly. The longest tapeworm removed from a human was approximately 11 meters long. Tapeworms do not have a digestive system, but obtain all of their nutrients from the host. Pseudoscorpions are small, harmless arachnids. To move from one place to another, they will sometimes latch onto the legs of flies and thus be carried long distances that they would not readily be able to traverse.