Q: Describe the effects of the disappearance of beaver from an ecosystem on the wolf population
A: Introduction An ecosystem is a functional and structural unit of ecology in which living species…
Q: Organisms such as ferns that may occur randomly on a forest floor, do not display competition.…
A: The answer of this question is False. Because the ferns found on the forest floor do show…
Q: All members of a cohort are the same_____ . a. sex b. size c. age d. weight
A: Introduction An ecosystem deals with both biotic and abiotic factors and their interaction with…
Q: A population of 1,492 finches is introduced to a rainforest. Over the next year, the finches show a…
A:
Q: Mark Recapture can be written as M N = R Define each term. Use this equation to answer the following…
A: Introduction A population is the total number of people who live in the same area. The population…
Q: Which statement about environmental stochasticity is true? O A. Environmental stochasticity places…
A: When the parameters that decide human fates and population growth change from year to year, this is…
Q: Now suppose that the researchers repeat their chocolate study, this time using new individuals for…
A: Blood pressure is defined as the pressure with which blood flows through our circulatory system.
Q: B) Migration is a one-way movement. C) Because their offspring return to the ocean, the entire…
A: Salmon are considered “anadromous” which means they live in both fresh and salt water. These are…
Q: Ifthe age distribution diagram is bottom heavy or pyramidal in shape, thisindicates that the…
A: Population refers to all the organisms of the same group or species that live in a particular area…
Q: When r is a positive number, the population size is (a) stable (b) increasing (c) decreasing (d)…
A: The population size in an ecosystem is affected by four important factors: immigration, immigration,…
Q: A group of acarologists recorded 6,723 black-legged ticks (Ixodes scapularis) per acre in one patch…
A: Ecology is the study of of the interaction between biotic and abiotic components of the environment.
Q: In a type I survivorship curve, mortalitya. rises steeply later in life.b. is the same at any age.c.…
A: There are two main components of nature- organisms and the environment. The branch of biology that…
Q: om a population perspective under a constant reproductive rate of 1- fspring per female per…
A: Growth rates refer to the percentage change of a specific variable within a specific time period.
Q: Carrying capacity is and is represented by the letter on the graph. O he maximum number of…
A: Population size The population size of an ecosystem depends upon food, shelter, area, etc.
Q: Women, white in USA, 1939-1941 B Women in India 1921-1930 Theore tical population with haif-life of…
A: A survivorship curve measures the proportion of individual in a particular species that can survive…
Q: Contrast the selective pressures operating in high-density populations (those near the carrying…
A: Selection pressures are external agents that can change or affects the organism’s ability to survive…
Q: If N<k, the value of r is negative and the population declines. Natural populations may grow at…
A: The equation for logistic growth is: dN/dt = rN (K-N)/K When N<<<<K Which means…
Q: The observation that members of a population are uniformlydistributed suggests that(A) resources are…
A: Population is the term given to the group of organisms occupying a particular area. Uniform…
Q: 3. Calculate the approximate doubling time for a population growing at 7.0% per year. A. about 1…
A: The population growth occurs by cell division process. By this process from one individual two…
Q: An example of a limiting factor would be the amount of food available in a population. True False
A: Introduction :- A limiting factor is something that restricts the size of a population and slows or…
Q: The“mean generation time” of a population equals:a.(x lxmx)/R0.b.nx.c.lx mx.d.x lx mx.e.none of the…
A: The mean generation time can be defined as the average length of time taken by the individual of a…
Q: As population and affluence increase so does the environmental impact. However, technology can…
A: As population and affluence increase, the environmental impact may or may not increase. Technology…
Q: Species with limited resources usually exhibit a(n)________ growth curve.a. logisticb. logicalc.…
A: THE NUMBER OF INDIVIDUAL OF A PARTICULAR SPECIES THAT A PARTICULAR ENVIRONMENT CAN SUPPORT IS CALLED…
Q: (A) G= N K – N) K (C) (B) (х-аxis) Question: What does the dotted line represent? O a. carrying…
A: The nature of increasement of individuals in a population is known as growth form. Characteristic…
Q: Habitats with moderate levels of disturbance have higher species diversity. A) True B) False
A: Habitats with moderate level of disturbance have higher species diversity is false because at…
Q: Population AA Aa aa 0.41 0.09 0.50 Given this distribution, what is the frequency of aa in the next…
A: In a population there are individuals with homozygous dominant ,heterozygous dominant and homozygous…
Q: Competition can lower the K for both species that are involved in the interaction. True False
A: Introduction: Competition between two species come into play when the resources utilized by both the…
Q: Infinite resources are often a source of conflict and competition. a)True B)False
A: Ans TRUE.
Q: EVOLUTION CONNECTION Contrast the selective pressuresoperating in high-density populations (those…
A: Population density is the term given to the number of organisms inhabiting a particular area of…
Q: Calcuate the lx(Survivorship which is equal to proportion of population surviving from birth) and…
A: Introduction :- Life table tells us about all the details of an population in an given interval of…
Q: A population will most likely deplete the resources of its environment if the population
A: Answer: Environment = The area surrounds us and the atmosphere surrounds us including, plants,…
Q: True False If N<K, the value of r is negative and the population declines Organisms that produce…
A: Reproduction is the act in which the offsprings are produced and multiplied at an regular rate. The…
Q: community that has low % overlap most likely has a ___species turnover. a. low b. high c. no
A: species turnover is the number of species eliminated and replaced per unit time.
Q: A late frost killed many of the tomato plants in neighbourhood gardens, greatly decreasing the…
A: Limiting factors are the factors which bring down the extension and magnitude of a population . It…
Q: The changes in the leading determinants of mortality between the time periods reflected by Figure 2A…
A: Disease is any disorder that affects the body's normal physiology and metabolic activity Example of…
Q: All species have a tolerance limit before they are no longer well suited to live in their…
A: Every organism has a set limit of parameters (e.g. temperature, pressure, pH etc) , outside which…
Q: If the animal population increased, the amount of atmospheric carbon would: A. increase B.decrease…
A: If the animal population increased, the amount of atmospheric carbon would: B. DECREASE
Q: One argument for hunting and fishing is to limit wildlife populations to near 1/2 K. WHY is this…
A: Hunting can be isolated into three general classes: "resource hunting" (nourishment for own…
Q: The allee effect is the population growth principle th
A: Answer: The Allee effect is a phenomenon in biology characterized by a correlation between…
Q: A community is Group of answer choices a. Factors that affect population size and how and why it…
A: The studies of organisms and their interactions with their surroundings are known as Ecology. An…
Q: The purpose of the experiment is to study how_______(IV) affects the ______(DV). Explain the…
A: The carrying capacity for a population is the maximum population of a particular species that a…
Q: What impact did commercial whaling have on blue whale populations? A It slightly decreased the…
A: The blue whale is an underwater animal so it requires a high and continuous supply of oxygen…
Q: Vhich of the following can limit where a population is located? roturo
A: The word "population biology" has a variety of connotations. In 1971, Edward O. Wilson et al. coined…
Q: Explain why you agree or disagree with the followingpropositions:a. Stabilizing population is not…
A: Introduction A population is the smallest unit of any ecosystem which collectively includes the…
Q: A sudden natural catastrophe resulting in massive die-offs would be categorized as a…
A: Many species are absent from the area which is a suitable habitat because of several factors:- 1)…
Q: A reef that receives most of its fish recruits from other reefs and supplies few larvae to other…
A: * coral reef coral reef is in water can form of colonies of coral polyps of calcium carbonate.C *…
Q: The population described in this table is: O A) growing O B) declining O C) stable
A: The population growth here is
Answer part B using the given table
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- Tristan da Cunha is a group of small islands in themiddle of the Atlantic Ocean. In 1814, a group of 15British colonists founded a settlement on these islands.In 1885, 15 of the 19 males on the island were lost ina shipwreck. In the late 1960s, four cases of retinitispigmentosa, which progressively leads to blindness,were found among the 240 descendants of these settlers remaining on the island. The frequency of retinitis pigmentosa in Britain is about 1 in 6000. Explainthe high incidence of this disease on Tristan daCunha relative to that seen in Britain.Assuming that the mutation rate is µ/gamete/generation andthe population size is N diploid individuals, what is the numberof new mutations introduced into the population each generation?Different species of crickets have distinct songs, andthey use these songs for mate recognition. Researcherscrossed two species of Hawaiian crickets (Laupala paranigra and L. kohalensis) whose songs are distinguishedby pulse rate (the number of pulses per second; Shaw etal., Molecular Ecology 16, 2007, 2879–2892.) Then, theymapped QTL in the F2 population derived from thiscross. Six autosomal QTL were detected. The mean traitvalues (pulses per second) at the three genotypic classesin the F2 for each QTL are shown in the table below,where P indicates the L. paranigra allele and K indicatesthe L. kohalensis allele.a. Calculate the additive (A) and dominance (D) effectsand the D/A ratio for each of the six QTL.b. Which of these QTL shows the greatest amount ofdominance?c. Which of these has the largest additive effect?d. The mean pulse rate for L. kohalensis is 3.72, and it is0.71 for L. paranigra. Do all six QTL act in the expecteddirection with the L. kohalensis allele conferring a…
- In a large, randomly mating population, the frequency of an autosomalrecessive lethal allele is 0.20. What will the frequency of this allele be inthe next generation if all homozygotes die before reproducing?Entomologists at the New York State Department of Agriculture are interested in determiningthe connection between pest insects infesting crop plants with populations of the same insectinfesting native plants in natural habitats. Long term trapping and monitoring studies haveestimated that on average 3% of the populations move between habitats (farm to natural and visversa) each generation. A new insecticide resistance allele (∆K) has begun to increase infrequency in the agricultural populations. A genotyping survey at this locus of 50 individuals ineach population has revealed the following genotype counts: K/K K/∆K ∆K/∆K Agricultural field 32 16 2 Forest 48 2 0 4a. Based on the effects of migration alone, what will the frequency of ∆K be in the forestpopulation in the next generation? 4b. If migration was acting in here without selection, what would the frequency of ΔK be in theagricultural population in the next generation? 4c. If the natural forest population was…Hardy-Welnberg Equilibrlum Scenarlo In a population of beetles, the dominant shell coior is black whlie the recessive shell color is brown. There are only two observed variations and black shels are betieved to be completely dominant to brown shells (following Mendellan genetics ruies). The beetles are an endangered species, so the zoo where they ive keeps a very close count on the population in hopes of returning them to the wild someday. The total number of beetles in the exthitat is 1,387 956 beetles are black Using the information provided above, what is the frequency of homozygous dominant individuals? 6 points O Approximately 19% of the beetles. O Approximately 31% of the beetles. O Approximately 49% of the beetles. O Approximately 69% of the beetles. Using the information provided above, what is the frequency of
- An allele of the G6PD gene acts in a recessive manner to cause sensitivity to fava beans, resulting in ahemolytic reaction (lysis of red blood cells) afteringestion of the beans. The same allele also confersdominant resistance to malaria. The heterozygote hasan advantage in a region where malaria is prevalent.Will the equilibrium frequency (qe) be the same foran African and a North American country? Whatfactors affect qe?Fruit flies of the genus Drosophila are distributed worldwide, but 30-40% are found on Hawaiian islands. How can you explain this distribution pattern? I’m addition, most species that have been identified are almost indistinguishable from other species and yet vary few hybrids have ever been observed. How might this phenomenon be explained?Why is a balancedfrequency of different allelesof a gene in a population moreuseful for the survival of thatpopulation facingenvironmental changes?
- Color blindness in humans is caused by an X-linked recessive allele. Ten percent of the males of a large andrandomly mating population are color-blind. A representative group of 1000 people from this population migrates to a South Pacific island, where there are already1000 inhabitants and where 30 percent of the males arecolor-blind. Assuming that Hardy–Weinberg equilibrium applies throughout (in the two original populationsbefore the migration and in the mixed population immediately after the migration), what fraction of malesand females can be expected to be color-blind in the generation immediately after the arrival of the migrants?Chargaffs DNA Data Base Compoeltion In Varlous Speclee (%) Species A T G Homo sapiens 31.0 31.5 19.1 18.4 Drosophila melanogaster 27.3 27.6 22.5 22.5 Zea mays 25.6 25.3 24.5 24.6 Neurospora crassa 23.0 23.3 27.1 26.6 Escherichia coli 24.6 24.3 25.5 25.6 Bacillus subtilis 28.4 29.0 21.0 21.6 The table above shows the amount of the 4 DNA nucleotides found in 6 different species. Another species has DNA that is 10% Adenine (A). What is the % of T, G, and C in the DNA of this species? You may copy and paste this sentence to help you answer clearly: The species is 10% A, 96 T, 96 G and 96 C. The species is 10% A, 10 % R, DELL F11 PrtScr F4 F5 F6 F7 F8 F9 F10 F12 In & 8. 9. 5 6. 7 9. E T Y *00 %S4Within a population of sunflowers, a new individual has a novel dominant mutation that causes it to flower 4 months earlier than the rest of the population. That sunflower survives and successfully self-fertilizes, leading over time to a novel population that evolves larger leaves and smaller flowers. This new population does not interbreed with the original population, although they are found in the same areas. This is an example of Allopolyploid speciation O Behavioral isolation O Allopatric speciation O Sympatric speciation O Adaptive radiation