Occasionally an ectopic pacemaker will develop in part of the conducting system of the heart. What happens to heart rate if an ectopic pacemaker depolarizes at a rate of 120 times per minute?

Q: Define the role of lactose in induction ?

A: Their are wide range of meaning of induction in biology with respective to branches of biology.In em...

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A: Introduction :-  Any moderately large natural body that revolves in an orbit around the Sun or anoth...

Q: An animal cell of 60 μm length is enlarged photographically. An enlargement print is made showing th...

A: Introduction Magnification is the method of enlarging something's apparent size rather than its true...

Q: Explain why blue tits in France were unable to experience local adaptation (i.e., timing reproductio...

A: Hi

Q: What are the parts of cell involved during meiotic division? Specify the parts during prophase, meta...

A: Introduction :- A cell must first go through interphase before entering meiosis I. The cell grows du...

Q: Which of the following best describes an organ system Group of answer choices organs that collective...

A: A group of tissues that anatomically constitute a functional unit specialised to fulfil a specific f...

Q: You develop a callus on the bottom of your hallux from a pair of ill-fitting shoes, and you feel the...

A: Onychocryptosis, or ingrown toenail, is a very common nail disorder in which the nail edge extends i...

Q: If a DNA molecule has (C+T)/(G+A)=1.95, what can you conclude about the structure of this DNA?

A: DNA is two stranded structure which is formed by numerous nucleotide combine with each other . A Nuc...

Q: 4. What would be the phenotypes, phenotypic ratio, and gen kids, if the mother is heterozygous freck...

A: An Individuals receive two variant of each gene from their  parent. These variant form of a gene are...

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A: The DNA is the genetic material that is responsible for the production of RNA transcription process....

Q: What conditions and food can lead to B. cereus food poisoning outbreak

A: INTRODUCTION Bacillus cereus has become an important cause of food poisoning. It is widley distribut...

Q: Adaptive radiations can be a direct consequence of three of the following four factors. Select the f...

A: Introduction Adaptive radiation is a force in which organisms rapidly develop from an ancestral spec...

Q: Write a short essay contrasting how the concepts may differ betweenbacteria and eukaryotes ?

A: In biology, a cell is a membrane-bound unit that has the basic molecules of life and is made up of w...

Q: The protein based hormones that cannot enter cells is called; O Steroid hormones O Two of these answ...

A: There are few important terms which should kept in mind before answering the above question: We kno...

Q: Which of the following neurotransmitters does NOT have one NH2 unit in its structure? O serotonin O ...

A: Neurotransmitters are specific molecules that are released from the presynaptic neuron and responsib...

Q: What are the physiological advantages in sport due to using testosterone? What are the physiological...

A: 1) The male sex hormone testosterone, is often dopped by athletes to enhance their performance in sp...

Q: Rett's syndrome is an x-linked dominant trait. Sally's father has Rett's syndrome. She has the condi...

A: Based on the Punnette square, the first child of Sally and Harry will have 50% probability of having...

Q: What is the most common neurotransmitter used between neurons? O None of these is correct DNA O Aldo...

A: Answer : Option (1)  - none of these is correct.

Q: booster antigen 1 month after the initial inoculation, and collect antibodies (antiserum) 1 week lat...

A: Having considered how an appropriate primary immune response is mounted to pathogens in both the per...

Q: Identify the following polysaccharides for each of the following uses: a.) Plants i.) Cell wall ii.)...

A: Polysaccharides are made up of more than 10 monosaccharide units that are joint together by glycosid...

Q: What are the 4 major events comprising the process of fertilization?

A: Note: As Per Bartleby Guidelines only one question is answered. For further answers repost the quest...

Q: Of the three systems that make up a plant, which can be modified into a Stolon or a Rhizome? Group o...

A: Given: Plants modification includes roots modification - Fusiform roots,napiform roots,Beaded roots ...

Q: How are blood glucose concentration affected by heavy alcohol consumption? Please explain with extre...

A: The role of blood sugar in our overall health is extremely essential to understand for a few reasons...

Q: Identify the secondary structures present in the protein and its genes code MKKKVLALAAAITVVAPLQSVAF...

A: Proteins are large biomolecules that compose structural and motor elements of a cell, and also as ca...

Q: Why living things over time have changed?

A: Introduction: Evolution is a change in the characteristics of living things over time.In natural sel...

Q: Select the disease which makes lungs lose its elasticity due to the inflammation of alveoli. A. Lung...

A:

Q: I’m confused on improper fractions do I make them decimals or mixed fractions

A: Yes , you can make improper fractions to decimals or mixed fractions. To convert a proper or imprope...

Q: 2. In tomatoes, 2 pairs of genes affect the phenotypes of ripe fruit with the following alleles. R =...

A: Genotype is the genetical makeup of the organism for suppose TT tall trait, Tt heterozygous tall. Tt...

Q: Draw a representative agarose gel showing the bands, and the direction of current flow as well point...

A: When we will digest the clone with EcoRI then we should get two bands on an agarose gel. One will co...

Q: How is genetic expression regulated?

A: Genetic expression is also known as gene expression.  It is the process of the transfer of informati...

Q: 1. Consider some question about cell structure or function that you would be interested in answering...

A: Answer 

Q: In tomatoes, red fruit is dominant over yellow, two-loculed fruit is dominant over many-loculed frui...

A: There are different types of crosses that can be observed in nature. One the crosses is monohybrid c...

Q: What characteristic would you expect to see in a pedigree of an X-linked dominant trait? O The allel...

A: Genetic problems related with abnormalities in genes on the X chromosome are referred to as X-linked...

Q: What are long terminal repeat (LTR) ?

A: Long terminal repeat are repetitive sequence of DNA found at the end of pro-viral DNA after reverse ...

Q: Could a cell function if it were not enclosed by a selective barrier (i.e., a plasma membrane)?

A: Introduction: Cells are the building blocks of all living beings. Prokaryotes and eukaryotes are two...

Q: When is melatonin usually produced in higher levels? O Melatonin levels remain constant throughout t...

A: Melatonin is a hormone produced largely by the pineal gland at night and has long been related with ...

Q: Generally speaking, what two considerations determine whether a specific dihedral angle will be perm...

A: Answer: A dihedral angle of a protein phi (ϕ) and psi (ψ) angles is the internal angle of the polype...

Q: 1. Label the Last Universal Common Ancestor on this tree. 2. Where on this tree would you find ances...

A: According to bartleby guidelines we’re answering first 3 sub-parts and please repost other questions...

Q: Write the advantages and disadvantages of applying such application in the DNA of an organism. 3. P...

A: GMOs  Genetically modified organisms are those organisms whose DNA has been altered in order to enha...

Q: veral hormones work together to control blood glucose levels; No answer text provided. False True No...

A: Normal blood glucose level is 80 to 120 mg per deciliter of blood. It is very important to control t...

Q: Chlamydomonas cells exposed to high light grow faster than cells grown under lower light. Why is th...

A: All organisms on earth required input of energy from its environment. We know that his sun  is the o...

Q: Tabulate five (5) differences between frog and mammalian ovaries, and three (3) differences between ...

A: Characteristics Frog Mammal Ovary The Frog ovary, which contains six or more central, hollow sacs ...

Q: A presumed dihybrid in Drosophila, B/b ; F/f, is testcrossed with b/b ; f/f. (B = black body;b = bro...

A: Answer : Based on the date given :  expected frequencies comes to be : 222.30 each for black forked ...

Q: Compare DNA transposons and retrotransposons. What propertiesdo they share?

A: A transposable element (TE, transposon, or jumping gene) is a DNA sequence that may move about withi...

Q: Below is a small 2 exon long gene. The exons are underlined, and the 22 nucleotide long intron is th...

A: Untranslated regions are present in RNA which are transcribed but not translated on either end of th...

Q: marijuana O alcohol O hallucinogens All of these are strongly impacted by the social setting.

A: All these are psychoactive drugs that stimulate some parts of the brain. These drugs make  people fo...

Q: Do you observe any abnormalities in cultivated crops?

A: Answer : The cultivated crops are the crops which are planted or grown by the humans and are also ta...

Q: A. Below is a small 2 exon long gene. The exons are underlined, and the 22 nucleotide long intron is...

A: "Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts f...

Q: 4. O 1:27-Coronary Artery How is the coronary artery identified on the sheep heart? 5. O 1:47- Right...

A: Introduction The heart, blood vessels, and blood are all part of the blood circulatory system, which...

Q: List and describe the six functions that proteins provide to cells

A: Proteins are large biomolecules that compose structural and motor elements of a cell, and also as ca...