Q: What do the three main types of cell-surface receptors have in common? How do they differ?
A: Cell surface receptors (membrane receptors, transmembrane receptors) are receptors found on the outs...
Q: A substance or an agent in the environment that increases the chance of genetic alteration and cance...
A: Answer Malignant tumor
Q: Which of the following is not a function of the plasma membrane? (a) transports materials (b) helps ...
A:
Q: Hypothesize why a dry and unpredictable habitat favors r-selected species. Support your hypothesis w...
A: r-selected species, also known as r-strategist species, are those whose populations are controlled b...
Q: Provide the taxonomic details of all the observed representatives of Platyhelminthes.
A: Phylum Platyhelminthes is a member of the Animalia kingdom. There are 13,000 species in this phylum....
Q: What is DNA methylation? When we say that DNA methylation is heritable, what do we mean? How is it p...
A: Genetics is a branch of science that studies an organism's genes, heredity, and genetic variation. G...
Q: Match the following with A. First line of defense, B. second line of defense, C third line of defens...
A: INTRODUCTION In the human body there are three lines of defence it may fight against the...
Q: List counselling points to discuss with a patient who has trouble swallowing and is picking up a pre...
A: There could be several reasons for people who have difficulty in swallowing tablets or capsules espe...
Q: Coal miners inhale large quantities of fine coal dust when they are working in the mines. Over the y...
A: Introduction: Coal miners are at a very high risk of developing lung disorders such as pneumoconiose...
Q: How Will Plants FACE a High-CO2 Future?
A: Carbon dioxide is taken by plants to perform photosynthesis.
Q: name the connective tissue layers that surround muscle fibers, muscle fasciculi, and whole muscles.
A: name the connective tissue layers that surround muscle fibers, muscle fasciculi, and whole muscles.
Q: If individuals vary, and variation affects survival and reproduction, and variation is heritable: t...
A: Charles Darwin developed a theory of evolution to explain the unity and diversity of life, based on ...
Q: Describe the malaria is and where it is prevalent- in what areas of the globe and in what habitats?(...
A: A parasite is a parasitic creature that lives inside or on the host. A different organism serves as ...
Q: What are two obvious features of interphase in plant or animal cells?
A: The interphase represents the duration between two succesive mitotic divisions. It is the period in ...
Q: What do we need if we want our defibrillator to work effectively?
A: Defibrillator is used when the heart is not working properly because it is unable to generate curren...
Q: The trp operon in E. coli encodes enzymes essential for the biosynthesis of tryptophan. In the opero...
A: trp operon is a repressor operon found in E. coli bacteria, which consists of a group of genes that ...
Q: 7. In pea plants, inflated pod is governed by a completely dominant gene and a constricted pod by a ...
A: Answer :: A gene may have different variants, expressing different characteristics. These variants a...
Q: The diagram shows the movement of Na' ions out of a cell. High Concentration Low Concentr ation Na* ...
A: Cell membranes possess two qualities - They are semi permeable They are selective Movement of mo...
Q: Why do lipids contain more energy than carbohydrates?
A: Biological macromolecules are classified into three types: Carbohydrates The nucleic acids Proteins...
Q: How do we detect relatedness among species?
A:
Q: actions wi
A: All of the above Sialyl - Lewis plays a critical role in Cancer metastasis, facilitating the extrava...
Q: A pea plant has a mendilian completely dominant gene for height lower colour phenotype. A pure breed...
A: Gregor Johann Mendel is considered to be the father of genetics. He postulated the theories of genet...
Q: Why do you use oil on the slide to be examined with the oil-immersion objective?
A: Oil Immersion Microscopy increases the refractive index of a specimen when used in Correct way. With...
Q: Epithelium–Mesenchyme transitions (MET or EMT) are crucial morphogenetic events occurring during gas...
A: An epithelial-mesenchymal transition (EMT) is a biological process in which a polarised epithelial c...
Q: Phases of meiosis Metaphase II Chromosomes line up on the equator.
A: Answer
Q: Why do gram-positive bacteria not produce endotoxins?
A: ExotoxinsThey are proteineous substances that are produced within the bacterium as a byproduct of gr...
Q: 17. glycogen is a form of ____________in ________ cells long term- energy storage, plant structura...
A: Glycogen is the multibranched polysaccharides consist of multiple glucose molecules liked together b...
Q: Illustrate with diagrams and briefly explain the proteolysis of an immunoglobulin with (i) papain, (...
A: The glycoprotein molecules produced by plasma cells or white blood cells are known as the Immunoglo...
Q: 25. Given the following mRNA codons and amino acids, construct a polypeptide from this DNA strand. D...
A: Transcription is a process in which the genetic information in the DNA is converted into RNA in the ...
Q: Integumentary System 10 13 ACROSS DOWN 1 half-moon shaped region at every nail 3 small pinpoint hemo...
A: ACROSS:- 2. small raised red lesion - Papule 7. mole:- nevus 9. boil furuncle 11. watery blister:- v...
Q: In cotransport (indirect active transport) (a) a uniporter moves a solute across a membrane against ...
A: Indirect active transport uses the downhill flow of an ion to pump some other molecule or ion agains...
Q: 6. Preparation of frozen and paraffin infiltration of tissues is routinely employed for cellular and...
A: There are few important point about the preparation of frozen and paraffin and infiltration of tiss...
Q: similarties and differences between first and last. similarties and differences between 3rd and 4th.
A: Differences between Blotiella pubescense and Callicarpa americana : Blotiella is commonly known as ...
Q: f1)Which of the following best describes polygenic traits? A single trait is affected by multipl...
A: Polygenic Traits: A polygenic trait is one that is influenced by a number of non-allelic genes. Pol...
Q: What distinguishes carbs from lipids as an energy source?
A: Lipids are a diverse group of molecules that include fat, waxes, sterols, fat-soluble vitamins, trig...
Q: . In mice, the following alleles were used in a cross: W = waltzing gait w = nonwaltzing gait G = no...
A: The collection of genes that make up a person's genotype is referred to as that person's genotype. I...
Q: Constructing a Genetic Map with a Two-Point Testcross Gene loci in testcross Recombination frequency...
A: Test cross data analysis us to measure the frequency of gametes.
Q: 90 80 70 60 R² = 0.2941 50 40 20 10 20 40 60 80 100 120 140 160 180 200 Height (in cm) Weight (in kg...
A: Regression analysis is a statistical method use to determine the relationship between two or more va...
Q: Suppose a population of organisms is in Hardy–Weinberg equilibrium. In the population, a gene has tw...
A: In Hardy-Weinberg equilibrium, p2+2pq+q2=1 Where p and q is allele frequencies. So, p= 0.72, q...
Q: Question 8: The following table shows the glycolysis reactions and their standard Gibbs free energy ...
A: The Vital process for to generate energy to run various metabolic, physical activities is the Glyco...
Q: Describe how an individual’s genotype influences their chance of contracting malaria: which individu...
A: Malaria is a mosquito-borne parasitic disease that causes fever, vomiting, headache, and tiredness. ...
Q: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two pe...
A: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two pe...
Q: Argue for OR against the use of biotechnology ( genetically engineered food) as a solution to world ...
A: GMOs are organisms in which the genomes of plants or animals with superior characteristics are made ...
Q: How are genetics and evolution related?
A: Genetics and evolution are related in that they are both sciences. Genetics is the study of how gene...
Q: What are the possible abnormal gametes the male can produce with non-disjunction occurring in Meiosi...
A: When nondisjunction occurs at the end of meiosis II it will result into 50% normal gametes. the poss...
Q: what is evolution and its importance? How would you explain it?
A: Evolution is merely a hypothesis. It is not a scientific law or a reality. Many people remember lear...
Q: A gardener finds that some bean plants have pubescent leaves and others have glabrous leaves. Ba...
A: Alleles are the alternative forms of a gene that are located on the same locus of a homologous chrom...
Q: What are the function of single nucleotides polymorphism?
A: Single Nucleotide Polymorphisms(SNPs) is the single nucleotide which occurs at the specific position...
Q: A lagging strand is sketched below. The Okazaki fragment DNA is red, and the RNA primers are dashed ...
A: Introduction: DNA stands for 'deoxyribonucleic acid' and it is the hereditary material in humans and...
Q: n yeast cells, telomerase remains active and maintains telomeres of about 300 base pairs. Propose wh...
A: Telomerase is an RNA-directed DNA polymerase that replicates the telomere ends of linear eukaryotic ...
3. Briefly describe allopatric and sympatric
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- 1. Differentiate between Sympatric, Allopatric and Parapatric Speciation.2. Describe at least two totally difference of Parapatric Speciation to Peripatric Speciation4. To which prezygotic isolation mechanism does each example below correspond: habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation? Parasites exploit new host species. Differences in binding protein allow sperm to fertilize. Pines release pollen in different seasons. Fireflies give specific patterns of signals. Plant floral tubes have different lengths. 5. What evidence shows that allopatric speciation can occur in fruit flies raised on different food sources?
- 33. Sympatric speciation differs from allopatric speciation in that sympatric speciation Group of answer choices is far more common than allopatric speciation requires geographic isolation in order to occur does not involve geographic isolation involves a reduction in gene flow between discrete groups of individuals belonging to the same species2. Reproductive isolation reduces gene flow between populations. This means that each subpopulation evolves separately and can result in a new species. Isolating mechanisms fall into the following categories. For each category, identify which example(s) from the chart above matches it. Reproductive Isolation: physiology prevents mating or producing fertile offspring Ex. Shape or reproductive organs not compatible. Temporal individuals mate at different times of year. Example: frogs that mate in May versus those that mate in July Isolation: timing isolation, Behavioral Isolation: behaviors prevent mating, Example: Birds recognize mates by songs or dance3. Sympatric speciation, in which the ancestral and descendant populations occupy exactly the same geographic area, with potential for hybridization between them, was first demonstrated (for animals): A. in the evolution of the polar bear Ursus arctos maritimus from the Kamchatka brown bear B. in the evolution of several Hawaiian honeycreepers from a single Asian migratory species C. in the evolution of metal-tolerant Anthoxanthum odoratum from metal-sensitive ancestors D. in the evolution of 13 Galapagos finches from a single South American migratory species E. in the evolution of the apple-maggot fly Rhagoletis pomonella from hawthorn fruit flies
- 1. Give 5 similar species with different characteristics. 2. Give examples on the reproductive isolating mechanisms (geographical isolation, behavioral isolation, mechanical isolation, gametic isolation, temporal or seasonal isolation) Note: example is in the photo attached1. Anagenesis (non-branching speciation), in which the ancestral and descendant populations do not co- exist in time, but might have occupied the same geographic area, is thought to have occurred in the case: A. of the evolution of several Hawaiian honeycreepers from a single Asian migratory species B. of the evolution of the polar bear Ursus arctos maritimus from the brown bear in Kamchatka C. of the evolution of 13 Galapagos finches from a single South American migratory species D. of the evolution of the proto-horse Merychippus from the near-horse Parahippus on prairies E. of the evolution of the arctic fox from the swift fox in tundra regions of North America9. How can changing environmental conditions or unpredictable events alter gene flow and “jump-start” speciation?
- 5. Which of the following evolutionary processes (leading to speciation) is based on random changes population gene frequencies, due to a sudden decline in population size, followed by a recovery? A. migration (like the evolution of Galapagos Island finches from one South American finch species) B. genetic drift (like the evolution of sinistral-coiling snails from dextral-coiling ancestral snails) C. mutation (like the evolution of a new strain of influenza virus from an old ancestral strain) D. natural selection (like the environmental selection of polar bears from ancestral brown bears) E. artificial selection (like the human-directed selection of friendly dogs from ancestral gray wolves)1. Explain how all 4 of the evolutionary aspects (mutation, gene flow,selection, and genetic drift) affect/have affected dogs for better or worse in present time ( or past time if relevant). Provide specific examples. 2. Explain how all 4 of the ecological interaction (mutualism, competition, predation, parasitism) affect/have affected dogs. Provide specifiv examples. Thank you1. What is speciation? 2. What is a “hybrid zone”? 3. What postzygotic barriers are often found in hybrid zones that result in a lack of species fusion? 4. What are the differences among the three possible outcomes for hybrids over time: reinforcement, fusion, and stability?