Options 1 and 2 can be tested through experimental procedures.
A hypothesis is an explanation for a given phenomenon from the real world.A testable hypothesis is a plausible explanation that can be proved (or rejected) by an experimental and/or observational procedure. A well-designed experiment should have into account the following characteristics: randomization, replication and local control.Manipulation indicates that one variable (dependent variable) is purposefully changed by the scientist in the environment.The controls must be used to prevent non-controlled factors which might be influencing the outcomes of the experiment.Option 3: it is not possible to carry out an experiment to test this hypothesis.Option 4: it is not a hypothesis and a false anachronic statement (cancer is a multifactorial disease that currently still has not been cured).In conclusion, only Options 1 and 2 can be tested through experimental procedures.
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explain the origin of lassa fever
Answer:
Lassa fever (LF) is an acute and sometimes severe viral hemorrhagic illness endemic in West Africa. The disease was first recognized in Nigeria in 1969. Humans contract Lassa virus (LASV) primarily through contact with contaminated excreta of the rodent Mastomys natalensis, which is the natural reservoir.
Explanation:
The DNA template strand of a gene near a promoter reads 5'-TAGAACGCCTCGAAATTTCATACT-3' The amino terminus of the encoded protein whose translation starts in this region is:
Answer:
The N-terminal aminoacid is Metionin.
Explanation:
Before answering the question, let us remember the meaning of the term amino terminus. Terminus refers to the extremes of the polypeptide. During translation, rRNA and tRNA read mRNA in 5´ to 3´ direction. The first extreme to be translated carries the amino-terminal group, while the other extreme carries the carboxy-terminus group.
Conventionally, proteins are written from left to right, beginning by the N-terminal extreme carrying the free amine group, and ending by the C-terminal extreme carrying the carboxyl free group. However, we need to know that the free amine group actually places at the end of a protein.
Transcription:
Transcription occurs in the nucleus where the template DNI strand is read in direction 3´→ 5´ to build the mRNA molecule in direction 5´→ 3´.
template DNI strand ⇒ 5'-TAGAACGCCTCGAAATTTCATACT-3'
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Translation:
Translation occurs in the cytoplasm. rRNA and tRNA read mRNA in the direction 5´→ 3´ to build the protein.
Protein synthesis initiates in the AUG start codon -Metionin-, and ends when reaching either of the stop codons UAA, UAG, UGA.
The first portion of mRNA is not read nor translated. This is the untranslated region (UTR), placed before the strat codon.
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Remember that transcription occurs from 5´ to 3´ extremes, so we need to read the codons in this direction too, beginning on the 5´ extreme.
First, we need to find the initiation codon: AUG coding for Metionin.
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Met
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Lys Met
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Phe Lys Met
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Arg Phe Lys Met
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Gly Arg Phe Lys Met
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Val Gly Arg Phe Lys Met
mRNA ⇒ 3´-AUCUUGCGGUGCUUUAAAGUAUGA- 5´
Leu Val Gly Arg Phe Lys Met
The N-terminal aminoacid is then Metionin.
21. What determines the kind of genes an organism
possesses?
Answer:
The kind of genes an organism possesses is determined by the order of the nucleotide bases in the organism's DNA.
Answer:
The kind of genes an organism possesses is determined by the order of the nucleotide bases in the organism's DNA. ... The order of bases as you go down the rungs of the ladder determine what genes an organism will have, and therefore, what traits it will have.
Explanation:
Fun facts:
Genes carry the information that determines your traits which are features or characteristics that are passed on to you — or inherited — from your parents. Each cell in the human body contains about 25,000 to 35,000 genes. ... And chromosomes are found inside cells. Your body is made of billions of cells.
why do you think Harvey placed the sea urchin cells in a hypersonic solution?
Harvey placed the sea urchin cells in a hypersonic solution in order to see the behaviour of the cell in the hypersonic solution.
What Harvey placed the sea urchin cells in a hypersonic solution?In 1940 Ethel Brown Harvey evolve a technique for separating embryonic sea urchin cells. She took a pair of embryonic cells to develop from the first cell division after Harvey's fertilization. She settles the pair of cells in a hypertonic solution, carrying double the amount of salt as that contained in seawater. Most sea urchins produce a group of early embryonic cells which is known as micromeres. Small blastomeres Harvey that form by unequal cell division at the vegetal pole of the early embryo. Harvey Sub-Sea is the first that indicated Maritime Labor Convention compliant.
So we can conclude that Ethel Brown Harvey developed a technique for dividing embryonic sea urchin cells.
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what defies a species?
Answer:
their color, their size, their life I guess
Organic compounds are primarily
created from one element. Which
element forms the basis of organic
compounds?
Which of these provides the best evidence for the plate tectonic theory?
The rise of magma by the convergence of earths plates
The destruction of earths magnetic field by the rotation of earths core
The variations in the age of rocks at different distances from the mid ocean ridges
The difference in the shapes of the Atlantic ridge and the coastlines of continents
Answer: C
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The base of the flower where it is attached to the rest of the plant is the:
1)pistil
2)receptacle
3)fruit
Answer:
The base of the flower where it is attached to the rest of the plant is the:Receptacle
Peduncle: The stalk of a flower. Receptacle: The part of a flower stalk where the parts of the flower are attached.
Explanation:
Flowers may be directly attached to the plant at their base (sessile—the supporting stalk or stem is highly reduced or absent). The stem or stalk subtending a flower is called a peduncle.
Answer:
receptacle
Explanation:
it is that part of the flower to which the stalk is attached to.it is small and found at the centre of the base of the flower
Which of the following best explains why the Galápagos islands are still used for evolution research today?
A) The diversity in environments on each island provides many opportunities to study how related organisms
have adapted over time.
B) The species diversity on the islands is one of the largest in the world, allowing for many examples of
evolution
C) The islands are easy to access from the mainland, and the climate is particularly well suited for research all
year long
D) Most species found on the islands are only found in this geographic area, which allows researchers to easily
isolate their studies.
The following best explains why the Galápagos islands are still used for evolution research today most species found on the islands are only found in this geographic area, which allows researchers to easily isolate their studies.
Galápagos are a extraordinary vicinity to observe evolution, still, because, remarkably, numerous islands and their population are near being withinside the completely herbal state, with very little have an impact on of human activities,” says the evolutionary biologist and Princeton University professor emeritus Peter Grant.
What is unique of Galápagos islands?Six hundred miles off the coast of Ecuador lie the volcanic islands of the Galápagos, well-known for a wealth of particular flora and animals discovered nowhere else withinside the world. The Galápagos Islands have been the supply of Darwin's concept of evolution and stay a valuable residing laboratory for scientists today.
Thus it is well explained.
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Question 20 of 34 Which of the following do all living things share? O A. All living things are made of the same elements. O B. All living things think. ОО C. All living things breathe oxygen. O D. All living things move.
Answer:
All living things think.
Explanation:
all living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
A genetic trait might be caused by incomplete dominance if:
A. red-, white-, and pink-flowered plants grow from the seeds of a
blue-flowered plant.
B. pinks, white, and red-flowered plants grow from the seeds of a
pink-flowered plant.
C. two plants with red flowers are the parents of plants with either
red flowers or white flowers.
O D. two plants with red-and-white flowers are the parents of plants
with either white flowers or pink flowers.
Mutations cause changes in _____.
A) elements
B) proteins
C) compounds
D)essential nutrients
Answer: A
Explanation:
3. The evolutionary pathways of ten different species are represented in the diagram below.
E
D
F
Time
G
Н,
B
Which two species are the most closely related?
A and F
G and
E and I
C and D
Answer:
C
Explanation:
when counting the number of organisms that differentiate between e and I, this answer gives the smallest number of organisms
The Milky Way galaxy looks like a band of light across the sky. Which observation would provide the best view of this band of light without a telescope
Answer:
The correct answer is - observing on any dark, clear night.
Explanation:
We and many other plants and our sun present in a galaxy, called the Milky Way as it appears as a milky band of light in the sky when you see it in a really dark clear area night.
It can be observed easily without the help of a telescope all it requires a dark but clear night without clouds. It looks like a hazy band or cloudy white or milky color band in the sky.
What type of microscope can detect density differences and thereby see organelles in living cells
Answer:
fluorescent microscope
Explanation:
fluorescent microscope. phase-contrast microscope
Which of the following statements about the use of synthetic polynucleotides in cracking the genetic code is true?
a) Particular codons are generated in predictable ratios with random RNA polymers containing specific ratios of different nucleotides.
b) Poly(A) RNA directs the synthesis of only polylysine in vitro.
c) Three different amino acids are incorporated into peptides when synthetic polymers of only one nucleotide are used to synthesize the RNA primer.
d) The codon table was completed by using RNA polymers of defined sequences.
Answer:
a) Particular codons are generated in predictable ratios with random RNA polymers containing specific ratios of different nucleotides.
b) Poly(A) RNA directs the synthesis of only polylysine in vitro.
d) The codon table was completed by using RNA polymers of defined sequences.
Explanation:
A polynucleotide molecule is defined as the biopolymer which is composed of thirteen nucleotide monomers or more monomers which is covalently bonded in the chain.
While using the synthetic polyneuclitide in the cracking of the genetic code, the translation of a [tex]\text{poly(A) RNA tail}[/tex] that results in synthesis of the poly-lysine in the lab.
Some of the particular codons are produced by some specific ratios of a different nucleotides. This can be present in the different RNA polymers. Codon table includes the RNA polymers that contains nucleotides in some specific ratios.
Thus, the options (a), (b) and (d) are correct.
The organ that controls your internal clock is called...
Answer:
The circadian biological clock is controlled by a part of the brain called the Suprachiasmatic Nucleus
Explanation:
That should be right
describe how insect pollinated flower are adampted to pollination
Answer:
Pollen grains are also adapted for insect pollination. Some pollen grains are hairy or spiky, and others are sticky, so they attach to the insect. The anthers dangle in the breeze, and the pollen is blown away. The pollen grains are very small and light so they are easily carried on the wind.
Explanation:
hope it helps
Explain if you are bothered by working conditions at Foxconn plants. Do you worry that the production of a phone might have contributed to a death of a worker
Answer:
Yes.
Explanation:
Yes, I am bothered by working conditions at Foxconn plants and do worry about the production of a phone that might have contributed to a death of a worker. If the working conditions are not satisfactory and the life of the worker are in danger so I worry about the lives of workers that work at Foxconn plants because of unsafe condition of work and stop the workers from working until safety measures should be implemented.
examples of receptors
Answer:
Chemoreceptors detect the presence of chemicals.
Thermoreceptors detect changes in temperature.
Mechanoreceptors detect mechanical forces.
Photoreceptors detect light during vision.
More specific examples of sensory receptors are baroreceptors, propioceptors, hygroreceptors, and osmoreceptors.
Explanation:
Answer:
Photo-receptors detect light during vision.
Explanation:
The given statements concern the relationship between mitochondrial hydrogen ion concentration and energy storage as ATP during oxidative phosphorylation. Classify each statement as either accurate or inaccurate.
a. Hydrogen ions cannot freely pass through the inner mitochondrial membrane.
b. H+ concentration is lower in the mitochondrial matrix than in the intermembrane space.
c. Energy is generated as a result of the difference in hydrogen ion concentration between the mitochondrial matrix and the cytoplasm.
d. ATP synthase uses energy from ATP to move H + into the mitochondrial matrix.
Solution :
The following statements regarding the relationship between the mitochondrial hydrogen ion concentration and energy storage in the form of ATP during the process of oxidative phosphorylation are :
ACCURATE :
a. Hydrogen ions cannot freely pass through the inner mitochondrial membrane.
b. H+ concentration is lower in the mitochondrial matrix than in the intermembrane space.
INACCURATE :
c. Energy is generated as a result of the difference in hydrogen ion concentration between the mitochondrial matrix and the cytoplasm.
d. ATP synthase uses energy from ATP to move H + into the mitochondrial matrix.
Why do we have to get the flu shot every year ?
Answer:
Because flu viruses evolve so quickly, last year's vaccine may not protect you from this year's viruses. New flu vaccines are released every year to keep up with rapidly adapting flu viruses.
What are the parts of the chloroplast? What does each part do?
What is an example of a symbiotic organism?
Answer:
The symbiotic relationship between an anemone (Heteractis magnifica) and a clownfish (Amphiron ocellaris) is a classic example of two organisms benefiting the other; the anemone provides the clownfish with protection and shelter, while the clownfish provides the anemone nutrients in the form of waste while also scaring
Explanation:
I asked the same question
Click and drag the terms on the left to accurately complete the sentences on the right. Then, arrange the sentences from top to bottom in order of least common to most common.
T cells, B cells, lymph node, destroyed, macrophage, immune response, antigen presenting cell, bound to transport proteins
a) Infected or malignant cells are then _______ before they can do further harm to the body.
b) The antigen presenting cell displays the antigen to the _______.
c) The T cells initiate the ________ if the antigens are viral proteins or abnormal antigens.
d) The _________ encounters and processes the antigen.
e) With the antigen, the antigen presenting cell migrates to the nearest ____________.
Answer:
d) The antigen-presenting cell encounters and processes the antigen.
e) With the antigen, the antigen-presenting cell migrates to the nearest lymph node.
b) The antigen-presenting cell displays the antigen to the T cells.
c) The T cells initiate the immune response if the antigens are viral proteins or abnormal antigens.
a) Infected or malignant cells are then destroyed before they can do further harm to the body.
Explanation:
The antigen-presenting cells (e.g., dendritic cells, macrophages) are cells of the immune system that mediate cellular immune responses by processing and presenting antigens (i.e., peptides components of pathogens) to T lymphocytes. The antigen-presenting cells travel through lymphatic vessels from the site of infection to the lymph nodes where they present antigens to naive T cells, i.e., T cells that have matured but have not yet encountered their corresponding antigens. This presentation facilitates the clonal expansion of T cells that are specific for the antigen which acquire effector functions in order to destroy infected cells. This process is known as immune clearance and is associated with the apoptosis of antigen-specific T cells.
What are the sum of all life functions 
Answer:
Regulation, Control, Coordination, Growth, Nutrient, Nutrition, Homeotasis
When there is NO change in the allele frequency, this is called genetic
You have a beautiful garden at home. On Sunday, you start budding your rose plant to make few more samples of rose plants to plant in the garden. Can you categorize how this scenario could be represented by classes and instances?
Answer:
It is possible to make this categorization as follows:
Roses = Class
Rose samples = instances
Explanation:
In a very direct and objective way, we can state that classes are models that define how a given situation will be handled, which methods will be used to manage it and the objectives that will be established in that situation. Instances, on the other hand, are elements taken from the interior of classes, which contain factors that make them up. Based on this, we can determine that, in the case of the above question, roses are classes and rose samples are instances.
Compared to the offspring of sexual reproduction in animals, the
þffspring of asexual reproduction will
A) show greater variety
B) be more resistant to disease
C) be genetically identical to the parent
D) grow larger
Answer:
C: Genetically identical.
Explanation:
Offspring are usually going to look like it's parents. Asexuals produce offspring that's supposed to look like them. I hope this helps :) and if it's wrong please know that I am very sorry for the mistake :(
20 POINTS PLEASE HELP
figure it out
Explanation:
ye Cuz I no do work for u