Q: What makes an impulse move down the line…i.e. what causes the next zone to depolarize? A. the Na+/K+...
A: A neuron has the capability of receiving inputs from another neuron. If this input is strong, then i...
Q: Can you show me the testcross
A: Recombination Recombination is the process where a part of chromosome is broke up and bind with ano...
Q: How can prokaryotes, who do not reproduce sexually, achieve genetic variation?
A: Prokaryotes are the primitive organisms that lack a proper nuclear membrane. There is no separation ...
Q: Give explain.
A: Shoots are aerial part of the plant where as roots are parts which are present below the ground.
Q: . Complete the following table by identifying the feedback mechanism involve in the following situat...
A: Endocrine system functions and maintain homeostasis based on the feedback mechanisms . Hormone level...
Q: 1. The science of cladistics produces a system for naming and classifying organisms
A: The organisms in the latest classification system have been classified according to shared traits an...
Q: 3. The gene that controls coat colour in rabbits has four alleles: agouti (C), chinchilla (cck), Him...
A: Answers : A) Heterogeneous Himalayan rabbit Chch Chinchilla rabbit- cchcch
Q: Eggs subjected to an isotonic solution will have a measured circumference that
A: Introduction: Isotonic solution:Two solutions with the same osmotic pressure over a semipermeable me...
Q: Which of the following are two hallmarks of the adaptive immune system? a. Immediate and Broad b. Sp...
A: The immune system safeguards your child's body against external intruders. These include bacteria, v...
Q: DISCUSS THE IMPORTANCE OF THE FATS IN PREPARATION OF CULINARY CUISINE
A: Fats are ester of fatty acids, they are if two types saturated and unsaturated fatty acids.
Q: Multiple choice) choose the best term that goes best with the description.
A: Answer : Option (1) is correct. - automatic ; controlled
Q: 8 QUESTION: Transcribe the gene. Write out the correct sequence of mRNA bases. Notice that this is t...
A: Transcription is the synthesis of RNA from DNA segment with the help of RNA polymerase enzyme. It ta...
Q: Activity: Adapting. For each animal or plant, think about where it lives and how il has adapled lo i...
A: Adaptations is a behavior, in which animals adapts with the change in environmental condition which ...
Q: How Will Plants FACE a High-CO2 Future?
A: Carbon dioxide is taken by plants to perform photosynthesis.
Q: What are the main human diseases caused by virus? Need more information about that
A: We have to explain in the above question what are the main human diseases caused by virus.
Q: What do you think is/are the most reliable criteria for determining muscle homologies? Are muscle na...
A: Homology is similarity in structure, it's physiology, which are been gained from the evolutionary an...
Q: Answer the following questions: What advantages do flowers give angiosperms over gymnosperms? Descr...
A: Answer 1: - Flowering plants have an advantage in reproduction over usual gymnosperms because of the...
Q: HAWAIIAN HONEYCREEPER What mechanism of evolution is applied in this diagram? Explain your answer.
A: Evolution can be defined as orderly change in flora and fauna which existed over millions of year on...
Q: A gene contains the sequence CGCATACGGTAC that results in the amino acid sequence arg-ile-arg-tyr. A...
A: Point mutations can be defined as mutations in single nucleotides. In point mutation, a nucleotide m...
Q: NASA has identified a new microbe present on Mars and requests that you determine the genetic code o...
A: Introduction RNA is an abbreviation for ribonucleic acid, a nucleic acid found in all living cells. ...
Q: A patient says that she must travel on business 3 days from now to a country where hepatitis A is en...
A: A highly contagious liver infection caused by the hepatitis A virus.
Q: Kinases catalyze the transfer of a phosphate group from a phosphate donor such as adenosine triphosp...
A: Hexokinase catalyzes the first step of the glycolysis cycle, and converts glucose to glucose‑6‑phosp...
Q: Your mother bought some meat from the market one day. She placed the meat in a pan but forgot to pla...
A: The reason for these consequences could be the rotting of meat. Maggots and flies are attracted to r...
Q: Do you think the human species can continue raising its global carrying capacity? How so, or why not...
A: Carrying capacity represents the population size that the environment can maintain for an indefinite...
Q: Steatorrhea is the presence of increased fat in feces. Which organ is least likely to be the cause o...
A: Steatorrhea is a metabolic disorder which results into fatty stools. The patient experiences fat ind...
Q: In yeast cells, telomerase remains active and maintains telomeres of about 300 base pairs. Propose w...
A: Telomerase is an enzyme that helps to build the telomere region by adding guanine-rich bases. It is ...
Q: Detail the key differences between lytic and nonlytic viral infection and provide an example of each...
A: Phages are viruses that infect bacterial cells.
Q: 3. Hershey-Chase (1952) The Definitive Proof Hershey and Chase utilized phages in their research. A ...
A: Hershey and Chase blending experiment gave unequivocal proof that DNA is the genetic material.
Q: The nervous system, the major anatomical and functional subdivisions.
A: The human body is a very complex creature made up of several systems. Each system in the human body ...
Q: How would you distinguish a stem cell from a B cell at the DNA level
A: Introduction: A stem cell is a type of cell that has the unique potential to differentiate into many...
Q: Most botanicals that treat the skin are topical or taken orally. What layer of skin does a topical b...
A: Option 4 i.e. all layers of skin are affected by a topical botanical.
Q: Under what conditions might receptor up-regulation occur? receptor down-regulation?
A: Signaling molecules bind to the receptors present in their target cells.
Q: step during the central dogma in which the Down syndrome becomes apparent and explain how it’s appar...
A: The process by which the instructions in DNA are converted into a functional product is refers as th...
Q: PKS modules can add 2 or 3 carbon units to extend the polyketide chain. This molecule ses the 3 carb...
A: Carboxylated acyl-CoA precursors work as activated donors and they are selected by the acyltransfera...
Q: Can you show the cross? Any explanation would be good
A: Test cross A cross to determine the genotype of an organism with a dominant phenotype. The cross inv...
Q: if one strand of the DNA molecule has the sequence 5’ TACGA 3, The other strand would have the seque...
A: DNA or Deoxyribonucleic acid is the genetic material which passes from one generation to another. DN...
Q: what is Endoplasmic reticulum
A: Introduction: A cell is the building blocks of all organisms, the smallest unit of a living thing.
Q: 65.what is the main function of the monosaccharide, glucose? glucose is an immediate energy source ...
A: Biological macromolecules are the substance that are needed in great amount and are metabolized to l...
Q: Phases of meiosis Anaphase II Sister chromatids separate.
A: phases of meiosis1: There are 4 stages of meiosis, prophase is the longest meiosis stage and it comp...
Q: Nonsilicates are a group of minerals that DO NOT contain what two elements? A. silver and gold B. si...
A: Answer-B. Silicon and oxygen
Q: Most adjacent plant cells are connected by plasmodesmata, whereas only certain adjacent animal cells...
A: Gap junctions are a type of connections present between the animal cells.
Q: The presence of a dimple on the cheek is governed by a dominant gene. A couple had already 4 childre...
A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous c...
Q: To produce transgenic bacteria that make insulin, which of the following steps didscientists have to...
A: Insulin is secreted by beta cells of pancreas. It allows glucose to enter the cells to provide energ...
Q: Under what circumstances might asexual reproduction be more advantageous than sexual?
A: Reproduction is the process by which an organism produce there offsprings. Actually by the reproduct...
Q: Why is the CRISPR-Cas system of bacteria considered an adaptiveimmunity rather than an innate immuni...
A: CRISPR is the clustered, regularly interspaced, short, palindromic repeats.
Q: What is the importance of dialysis in the absorption of food particles through the intestinal wall?
A: Intestine A long cylindrical pine in our gut which help in the absorption of different kind of mole...
Q: Predict the phenotypes of the progeny and the frequen- cies with which they will occur assuming (a) ...
A: Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message ...
Q: With each reaction cycle, the Na,K-ATPase hydrolyzes 1ATP, and pumps O 3 K+ ions out, and 2 Na+ ions...
A: Active transport: It is a cellular transport pathway involving the movement of molecules (ions, amin...
Q: organism. C. Use a restriction enzyme to cut DNA and form sticky ends. D. Read the sequences of base...
A: First question In recombinant DNA technology, there is joining together of DNA molecules from two di...
Q: X-linked lissencephaly is an X-link dominant trait pertaining to a brain disorder. It superficially ...
A: Given information Lissencephaly is an X-linked dominant trait Mr. Panganiban is affected by the dis...
Step by step
Solved in 2 steps
- One concept of conservation biology is known as minimum viablepopulation. Some species’ populations are so fragmented andsmall that they may have very little genetic variability left. Withminimal genetic variation in the population, there is little likelihoodthat a population can adapt to an environmental threat, such as anew disease. Florida panthers are at or below the minimum viablepopulation level (estimated population less than 80). 1)Do you think that it is practical to use limited resources toconserve a population like the Florida panther? 2)Why?mbers aferences A population that is in Hardy-Weinberg equilibrium does not experience any migration. How does this relate to evolution? * QOnline When individuals enter a population, adaptive radiation can occur. wsela Speciation only occurs when populations are completely isolated. ation Mogy Periods 1 and 2 When individuals enter or leave a population, the gene frequencies change. ng periods chool MP1, Highschool Highschool MP3, uchool MP4 O Migration interferes with nonrandom mating. Cion ting days Deer mice are usually found in the woods and are dark brown in color. The deer Tue Wed Thu Fri mice that live in the Sand Hills of Nebraska, however, have evolved a lighter coloring, the result of a change in one gene. How does this information illustrate natural selection? * Speciation occurs when groups are geographically isolated. 9:02 USIf these conditions held constant – what would the expected heterozygosity be in thepopulation today (2018 to deal with a clean integer value for generations)?1b. In 1884 the population had grown to 106 when disaster struck the island. Of the 19 adult menon the island, 15 were in the same fishing boat that capsized, leaving only 4 adult men alive onthe island. These desperate times may have changed the sex ratio of the breeding population onthe island. Let’s say that now, each man fathered children with an average of 1.5 differentwomen (male:female ratio of 1:1.5). If we start back with a heterozygosity of 0.5 from this point,given the effective population size on Tristan da Cunha, what is the expected heterozygosity inthe current population 7 generations later?1c. The scenarios described in 1a and 1b are examples of which two evolutionary phenomena,respectively?
- Most commonly, individuals of a population show a _______ distribution within their habitat. a. clumped b. random c. nearly uniform d. none of the aboveates O Molecular homology les bers erences In the 1890s, hunting reduced the northern elephant seal population to only 20 individuals. Due to conservation efforts, their population size today is above Online 30,000. Of what is this an example? * ela Founder effect eriods 1 and 2 Allopatric speciation ods P1, Highschool ool MP3, P4 Bottleneck effect Microevolution Thu Fri Two species of toads are reproductively isolated due to the fact that one species mates in early summer and one in late summer. What type of barrier is this? * Behavioral isolation Temporal isolationSnakes evolved from ancestors who had the ability to walk. Some snakes, in fact, still have small pelvis and leg bones that are remnants from this ancestor. What are these caled? Vestiglal structure O Homologous strucre O Sympatric structure O Molecular homology In the 1890s, hunting reduced the northern elephant seal population to only 20 individuals. Due to conservation efforts, their population size today is above 30,000. Of what is this an example? Founder effect
- KO> O Most hominin species, including Homo sapiens, arose in Africa. It is sometimes possible to extract DNA from ancient humans (of our species and closet cousins) for analysis. The oldest hominin DNA ever sequenced came from a 400,000-year-old thighbone. Comparisons among ancient remains and population of humans around the world have yielded insights into when and how various Homo species migrated out of Africa. The diagram below shows a comparison of DNA sequence from different human groups. position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 首 Dinka G G A C G C T G Italian G T. C T T. G Khoisan G A G T C G TC T T G C P.N. Guinean A G A G Yoruba G G A T A Based on the DNA sec shown above, Yoruba people are most closely related to which other population? O Papua New Guinean O Italian O Dinka and Khoisan equally O Dinka 4 5 6 7 8 10 11 Next > 囲O Ability to see UV light Grades lembers nferences In the 1890s, hunting reduced the northern elephant seal population to only 20 individuals. Due to conservation efforts, their population size today is above 30,000. How would the genetic diversity of the northern elephant seal population compare to the genetic diversity of the southern elephant seal population, which was not heavily hunted? * g Online sela on Periods 1 and 2 riods MP1, Highschool The northern elephant seal would have much less genetic varlation than the southern elephent seal. hool MP3, The southern elephant sea would have much less genetic variation than the northern elephant seal. AP4 O The two populations would have similar genetic variation Thu Fri The southern elephant seal would have stable genetic variation because it is in Hardy- Weinberg equilibrium. You are studying two variations of banana slugs. They have similar coloration and ATthnh thare.nhveieallu obl lein thecomeheh US A 9:0(log) Number of species 12 10- co 4 2 0 0 400 800 1200 Age of clade (My) Figure 2. The relationship between clade age and number of species. (Note log scale on y-axis.) Question 3. Does species richness increase or decrease with clade age? Question 4. Is the trend in question 3 statistically significant? How can you tell? Use the information in Figure 3 to answer questions 5 through 8.
- The graph below shows changes in the size of an Emperorpenguin population in terms of numbers of breeding pairson the island of Terre Adelie in the Antarctic. Scientistsused these data along with data on the penguins’ shrinking ice habitat to project a general decline in the island’sEmperor penguin population, to the point where theywill be endangered in 2100. Use the graph to answer thequestions on the right. What was the overall percentage decline in thepenguin population from 1975 to 2010?hich of these conditions would not contribute to the evolution of a population over time An extremely large population size Phenotypic variation that is due to environmental influences only The population lives in a habitat where there are competing species present. The organisms live in an environment that is changing at a relatively slow rate.Two hypothetical lizard populations found on opposite sides of a mountain in the Arizonan desert havetwo alleles (AF, AS) of a single gene A with the following three genotype frequencies:AFAF AFAS ASASPopulation 1 38 44 18Population 2 0 80 20a. What is the allele frequency of AFin the twopopulations?b. Do either of the two populations appear to be atHardy-Weinberg equilibrium?c. A huge flood opened a canyon in the mountainrange separating populations 1 and 2. They werethen able to migrate such that the two populations, which were of equal size, mixed completelyand mated at random. What are the frequenciesof the three genotypes (AFAF, AFAS, and ASAS) inthe next generation of the single new populationof lizards?