Answer:
1. Condenser
2. None of the above
3. Magnify 1000x
Explanation:
1. Illuminators provides the stable light source in the microscope. It can be reflected using a mirror for a built in microscope. Condenser is made up of two lenses which helps collect and concentrate light. The light beams passes through the centre of the lenses.
Total magnification is objective magnification × Ocular magnification
It makes the object appear bigger than it is. Any of the objective magnification can be uses to achieve the specific size. Objective ranges from 10-100
Oil immersion makes image appears brighter, they increase the refractive index. It is used with 100x objects to achieve a clearer image.
Sleve tubes are found in which vascular tissue?
OA. phloem
OB. xylem
Oc.
tracheids
Answer:
A. phloem
Explanation:
How N-formylmethionine (fMet) is only associated with the 5' AUG initiation codon and not with internal AUG codons, given that methionine in both cases in encoded by an AUG in the mRNA.
Answer:
Different transfer RNAs (tRNAs) selectively bind to N-terminal and internal AUG codons of bacterial polypeptides .
Explanation:
In prokaryotic organisms, N-formylmethionine (fMet) is coded by the start codon (AUG), thereby generating the most N-terminal residue of bacterial proteins. This residue (fMet) is a modified methionine amino acid that contains attached a formyl group to its amino group. Remarkably, it has been shown that formylmethionyl-tRNA only can bind to this initial AUG codon, while methionyl-tRNA binds to internal AUG codons.
The following are examples of characteristics that can be inherited except
(a)intelligence (b) complexion (C) type of blood (d) shape of head (e) sex of the child
Answer:
sex of the child
Explanation:
One element found in all living and dead organisms is ______.
Answer:
hydrozen............
......
i think!b..
Why are tanning beds not safe
Answer:
skin damages.
Explanation:
it hads UVA and UBV rays which cost the skin to be damaged by the rays. it can also make you have skin cancer.
Based on the objective you should feel comfortable calculating expected genotype frequencies when given observed allele frequencies. You should also be able to compare expected genotype frequencies from HWE to observed frequencies and determine if evolution is occurring. Here's a sample problem. You can do this without a calculator! Let's take the noob gene, a gene with two known alleles that determines feather color in the eastern lark. The two alleles, let's call them delta and gamma, can be sequenced. In fact, looking at a population in southern GA, you discover that 60% of the alleles in the population are the delta allele. So question 1, what is the percentage of the gamma allele in the population
Answer:
40% is the percentage of the gamma allele in the population.
Explanation:
Available data:
Two alleles, delta and gamma60% of the alleles in the southern GA population are the delta alleleWhat is the percentage of the gamma allele in the population?
According to Hardy-Weinberg, the allelic frequencies in a locus are represented as p and q, referring to the allelic dominant or recessive forms. The genotypic frequencies after one generation are p² (Homozygous dominant), 2pq (Heterozygous), q² (Homozygous recessive). Populations in H-W equilibrium will get the same allelic frequencies generation after generation. The sum of these allelic frequencies equals 1, this is p + q = 1.
In the same way, the sum of genotypic frequencies equals 1, this is
p² + 2pq + q² = 1
Being
p the dominant allelic frequency, q the recessive allelic frequency, p² the homozygous dominant genotypic frequency q² the homozygous recessive genotypic frequency 2pq the heterozygous genotypic frequencyIf the percentage of delta allele in a population is 60%, this means that its frequency is 0.6. By clearing the equation p + q = 1, we can calculate the gamma allele frequency. This is:
p + q = 1
0.6 + q = 1
q = 1 - 0.6
q = 0.4
Then the percentage of gamma allele in the population is 40%.
We can also think about it like this:
If the sum of the allelic frequencies equals 1, then 1 is 100% of the allelic frequencies. And if the percentage of delta allele in a population is 60%, then 40% is the percentage of gamma allele.
Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain you have filled every blank with a term before clicking Submit.
Nairobi ______ is the capital of Norway.
Buenos The capital of Canada is______
Aires ______is the capital of Indonesia.
Canberra ______is the capital of Australia.
Ottawa The capital of Kenya is________
Jakarta The capital of Argentina is______
Answer:
Oslo is the capital of Norway.
The capital of Canada is Ottawa.
Jakarta is the capital of Indonesia.
Canberra is the capital of Australia.
The capital of Kenya is Nairobi.
The capital of Argentina is Buenos Aires.
Explanation:
Oslo is the capital of Norway.
Being the biggest city of Norway, Oslo was made the capital of the country. It is also the most populous city in the country and is the main governmental and economical center of the nation.
The capital of Canada is Ottawa.
Chosen because of its location, the city of Ottawa was chosen by Queen Victoria to be the capital of Canada. It is the central point of access between the cities of Montreal and Toronto, and despite it's smaller status as a city, it was chosen as the capital due to its prominence in the location.
Jakarta is the capital of Indonesia.
Jakarta, located on the island of Java, is the capital of Indonesia. Formerly known as Batavia, this city was the official Dutch settlement during the colonial times. Now, it is presently the capital of the nation.
Canberra is the capital of Australia.
Despite Australia having numerous capital cities according to the boundary or seat of government it has, the city of Canberra is more regarded as the capital of the island nation. It is the largest inland city of the country and has numerous important government offices in it.
The capital of Kenya is Nairobi.
The biggest city in the Kenyan nation, the city of Nairobi is the capital of Kenya. The Nairobi River flows through the city, from which the Maasai name of the city Enkare Nairobi is attributed.
The capital of Argentina is Buenos Aires.
Buenos Aires is the capital of Argentina. It is also the largest city in the Latin nation and is home to numerous multi-nationals from various ethnic groups.
John is a 22-year-old professional skateboarder. He has recently fallen on his left shoulder which caused a severe dislocation of the joint. The clinician fears the impact and the dislocation may have caused damage to all or part of the brachial plexus. After performing a nerve conduction velocity test on Johnâs left arm, it was determined that the ulnar nerve was compromised. Which area of the brachial plexus was affected by the accident?
Answer:
The lower left area where the brachial plexus is, was affected in the axillary fossa.
Specifically in the area of the inferior nerve ramification, in the medial endings.
Explanation:
The brachial plexus is a nervous plexus that is classified into three nerve areas, the upper middle and lower areas, where the upper one faces the lateral nerve branches, the middle one to the posterior, and the lower one to the medial, within the medial nerves. is the ulnar nerve or the ulnar nerve that is the one that damaged John.
Question 17
Cancer is a disease in which some cells lose their ability
to control which of the following?
A
size
B
sister chromatids
C
rate of division
D
surface area
Answer:
rate of division
Explanation:
In normal cells, the cell cycle is controlled by a complex series of signaling pathways by which a cell grows, replicates its DNA and divides. In cancer, as a result of genetic mutations, this regulatory process malfunctions, resulting in uncontrolled cell proliferation.
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Cancer is a disease in which some cells lose their ability to control rate of division. The correct option is C.
What is cancer?Cancer is the body's unchecked proliferation of aberrant cells. When the body's natural control system malfunctions, cancer might emerge.
Instead of dying, old cells proliferate uncontrollably to produce new, aberrant cells. These excess cells could aggregate into a tissue mass known as a tumour.
Genes, the fundamental building blocks of inheritance, can change in ways that result in cancer.
Chromosomes are long, tightly packed DNA strands where genes are organised. Since genes that determine how our cells behave, particularly how they grow and divide, are altered, cancer is a genetic disease.
Thus, the correct option is C.
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Name 3 hormones that have a direct impact on calcium metabolism relating to the skeletal system
Answer:
Three major hormones (PTH, vitamin D, and calcitonin) interact to maintain a constant concentration of calcium, despite variations in intake and excretion.
Explanation:
The second major hormone involved in the regulation of calcium metabolism and skeletal remodeling is vitamin D, which includes cholecalciferol (vitamin D3) of animal origin, as well as ergocalciferol (vitamin D2) of plant origin.
Which of the following is true regarding limestone and dolostone? Group of answer choices A.Limestone only visibly reacts to acid if powdered. B.Dolostone only visibly reacts to acid if powdered. C.They both react to acid in their solid form. D.They are very similar, except limestone has magnesium in addition to calcium carbonate.
Answer: B.)
Explanation:
The statement is true regarding limestone and dolostone is as follows:
Dolostone only visibly reacts to acid if powdered.Thus, the correct option is B.
What is Dolostone?Dolostone may be defined as a sedimentary carbonate rock that possesses a high percentage of the mineral dolomite, CaMg(CO3)2.
Limestone is composed of the mineral calcite (CaCO3), while dolostone is composed of the mineral dolomite. They are both very similar to one another.
Limestone reacts with acids in solid form while dolostone visibly reacts with acids, if powdered.
Therefore, the correct option for this question is B.
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The majority of vaccines work by eliciting pathogen-specific antibodies that circulate in our bodies and protect us in the event that we are later exposed to that specific pathogen. For most viruses and bacterial toxins that we are vaccinated against, these pre-existing antibodies are protective because:
Answer:
Explanation:
Vaccines are penetrations into the body system that helps improve the immune system against specific diseases.
The vaccines act by imitating the disease causing organism i.e they resemble the disease causing organism this is because they have been made form strains of the weak or dead disease organism.
The body system is made to identify this toxins or disease organism as something strange that needs to be remove anytime it reoccurs in the cell when the vaccines are taken. Although the body sees vaccine as something harmful they do not actually cause the disease but are pointers to the disease causing organism.
______ is the process responsible for the situation above. This process can cause DNA to change in many ways. Three such ways are ______, _____, and _____.
Answer:
Explanation:
Mutation can cause a change in DNA to change in many ways.
Mutation is the sudden change in the genome of an organism that can be heritable from parent by their offspring.
Missense mutation - This occur when a base pair is substituted for by another leading to the formation of an entirely new amino acid.
Nonsense mutation - This occurs when a base pair is substituted for by another leading to the formation of a new amino acid. The new amino acid form therefore send a stop signal to the sequence of amino acid been built.
Insertion or deletion - Insertion mutation inserts new base pair into the sequence changing the number of the DNA base while deletion deletes a base pair changing the number of DNA base from the amino acid sequence.
How was the present-day theory of evolution developed?
Answer:
The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.
Explanation:
Ash trees are being removed when they show signs of the ash borer, a parasite that affects only ash trees and kills them off. What best explains why the ash trees are being cut down?
Answer:
The Ash Trees with Ash Borer are being cut down as a way to maintain the stability of the other Ash Trees.
Explanation:
As stated in the information given, "Ash trees are being removed when they show signs of the Ash Borer, a parasite that affects only Ash Trees and kills them off."
To preserve the other trees, these trees with the parasite must be cut down as a way to stop other trees from gaining this parasite. Its a preservation method for Ash Trees.
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Answer:
D
Explanation:
answer on edge
Which organ system
provides oxygen so that
exercising muscle fibers
can efficiently produce
ATP?
Answer:
lungs
Explanation:
idk if I'm correct I'm just guessing
It has been stated that the rainforests owe their existence at least in part to bats.
Is this a valid statement and why or why not? Defend your answer.
Answer: Valid Statement ✓
Explanation:
Bats have been known to contribute to the growth and restoration of Tropical Rainforests in 2 main ways. Seed Dispersal and Pollination.
Seed Dispersal.
Fruit Bats in the Tropical Rainforest are responsible for a lot of seed dispersal. Feeding at night to avoid predators, they eat fruits from various trees and then defecate these seeds after digestion. Fruit Bats like most other bats are very strong fliers and so cover a whole lot of distance at night meaning that they give the seeds a very wide coverage. Indeed it has been shown that because they defecate the seeds, the seed already has fertilizer to get nutrients from as it grows thereby increasing it's growth rate.
There are also trees and plants that have evolved to grow spiky or sticky fruit that attach themselves to the Bats which then deposit them elsewhere as they fly.
Pollination.
Fruit Bats have specialized long tongues to sip nectar from flowers. When they do this they pollinate the flowers. It has even been shown that some plants evolved to have brighter colours so as to attract these bats to enable pollination to happen. Indeed research shows that more than 125 genera of tropical plants rely on bats for pollination.
Bats plays an essential role in the existence of rainforests, they help to replenish and expand the area of rainforests.
The importance of bats:Bats plays an essential function in the existence of rainforests. Along with the birds they assist in some of the major activities like replenishing the devastated region and expanding the region of rainforests. It is known that the majority of the tropical plants are dependent upon the methods of seed dispersal for expansion of rainforests.
Apart from this, restoration of rainforests is also dependent upon the fruit-consuming animals like bats. Bats helps to disperse the shrub species to the gradually regenerating barren landscapes or grasslands or rainforests, which got devastated. It has been found that about 90 percent of the pollination and dispersal of seeds in rainforests is done with the help of species like bats.
The bats can assist in regenerating the deforested areas in short span of time in comparison to any modern strategies. Therefore, bats helps in afforestation of rainforests. Due to their aerial nature, they possesses the tendency to cover wide region and plays significant role in dispersal and pollination.
Thus, bats are essential for the existence of rainforests.
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How many groups are in the modem periodic table
Answer:
The correct answer is
18
Groups of the periodic table: The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups.
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Chemical equilibrium results if____.
Answer:
forward reaction rate equals reverse reaction rate
Explanation:
negatives about gypsy moths?
Answer:
Gypsy moths do not kill trees directly they defoliate them. Severe defoliation can add to other stresses such as weather extremes or human activities. This cumulative stress can leave trees vulnerable to disease or other pest infestation that can cause death.
Explanation:
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Answer:
The rise of the gypsy moth population will eventually kill many trees, as they won’t be able to perform photosynthesis. This event will negatively affect the lumber and construction industries, as well as the beauty of public and private landscapes.
Explanation:
PLATO
biology is important in
Answer:
it’s Important reasons for studying biology are to understand how cells and organisms work. It involves the study of life and it is very important as it tells us about the natural world. Biology tells us about our body, helping us to develop cures and treatments for many diseases.
Explanation:
the other ppl said it
Which statement is true of viruses? A. Viruses do not consist of cells, but they have cell membranes, cytoplasm, ribosomes, and other cell organelles. B. Viruses do not consist of cells; they lack cell membranes, but do have cytoplasm, ribosomes, and other cell organelles. C. Viruses do not consist of cells; they also lack cell membranes, cytoplasm, ribosomes, and other cell organelles. D. Viruses are cells with cell membranes, cytoplasm, ribosomes, and other cell organelles.
Answer:
C. Viruses do not consist of cells; they also lack cell membranes, cytoplasm, ribosomes, and other cell organelles.
Explanation:
Viruses are only composed of a couple things: strands of nucleic acid that can be DNA or RNA, a protein coat called a capsid, and potentially a glycolipid coat to protect the outside.
There are no organelles, nor are there cells. Keep in mind that a virus is nonliving, so D is utterly wrong.
In tomatoes, dwarf (d) is recessive to tall (D), and opaque (light-green) leaves (op) are recessive to green leaves (Op). The loci that determine height and leaf color are linked and separated by a distance of 7 m.u. For each of the following crosses, determine the phenotypes and proportions of progeny produced.
A. D Op/ d op*d op/d op
B. D op/ d Op*d op/d op
C. D Op/d op*D Op/op d op
D. D op/d Op*D op/d Op
Answer:
a). D Op / d op X d op / d op –Parents
as we know,
Distance (m.u.) = Recombination frequency (%)
D Op / d op genotype produces 4 types of gametes as below:
Recombinant gametes (7%):
D op = 3.5% , d Op= 3.5%
Non-recombinant gametes (93%):
D Op= 46.5% , d OP =46.5%
Genotype, d op / dop produces only one type of gametes, d op.
d op
D OP (46.5%) D OP/d op (46.5%) = Tall, green
D op (3.5%) D op/d op (3.5%) = Tall, opaque
d OP (3.5%) d OP/d op (3.5%)= Dwarf, green
d op (46.5%) d op/d op (46.5%) = Dwarf, opaque
b). similarily D op / d Op X d op / d op –Parents
Distance (m.u.) = Recombination frequency (%)
D op / d Op genotype produces 4 types of gametes similarily as in case a,
Genotype, d op / dop produces only one type of gametes, d op.
d op
D OP (3.5%) D OP/d op (3.5%) = Tall, green
D op (46.5%) D op/d op (46.5%) = Tall, opaque
d OP (46.5%) d OP/d op (46.5%)= Dwarf, green
d op (3.5%) d op/d op (3.5%) = Dwarf, opaque
c). D Op / d op X D Op / d op -----Parents
D Op / d op genotype produces 4 types of gametes as below:
Recombinant gametes (7%):
D op = 3.5% = 0.035 , d Op= 3.5%=0.035
Non-recombinant gametes (93%):
D Op= 46.5%=0.465 , d OP =46.5%=0.465
The table is attached for C.
d). D op / d Op X D op / d Op –Parents
Distance (m.u.) = Recombination frequency (%)
siliarily as a, b, and c gametes are four with the same frequency and table for the answer is attached
Recombinant gametes (7%):
D op = 3.5% = 0.035 , d Op= 3.5%=0.035
Non-recombinant gametes (93%):
D Op= 46.5%=0.465 , d OP =46.5%=0.465
A scientist is tracking object orbiting the sun that is found between Mars and Jupiter which additional feature can be used to determine the object is an astroid
Answer:
The options are not given. Here are the options;
produces a coma
has an irregular shape
has a tail of ice and dust
produces a streak of light.
The answer is has an irregular shape.
Explanation:
Asteroid are small objects that are too small to be called planets that revolve round the sun. They are smaller in size. The mass of the asteroids is less than the size of the Earth's moon.
Asteroids are leftovers from the formation of our solar system about 4.6 billion years ago. Earlier, the formation of Jupiter prevented any planetary bodies from forming in the gap between Mars and Jupiter, which make the small objects that were present to collide with each other and fragment into the asteroids.
Asteriods produce irregular shape.
Answer:
the answer is has an irregular shape or b
Explanation:
Nucleic acids and carbohydrates are both types of what?
A. Macromolecules
B. Proteins
C. Elements
D. Atoms
SUBM
Place the following generation of action potential steps in order:
1) sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
4) a graded depolarization brings an area of excitable membrane to the threshold.
5) a temporary hyperpolarization occurs.
6) sodium channel activation occurs.7) sodium ions enter the cell and further depolarization occurs.
Answer: 6) sodium channel activation occurs.
4)a graded depolarization brings an area of excitable membrane to the threshold.
7) sodium ions enter the cell and further depolarization occurs.
1)sodium channels are inactivated.
2) voltage-regulated potassium channels open and potassium moves out of the cell, initiating repolarization.
3) sodium channels regain their normal properties.
5) a temporary hyperpolarization occurs
Explanation:
action potential occurs when the differences in the concentrations of ions on opposite sides of a cellular membrane lead to a voltage of a specific cell location rapidly rises and falls.
The steps involved in this generation are;
First of all the sodium-gated channel activation occurs due to inflow of Na, this is called depolarization. A graded depolarization brings an area of excitable membrane to the threshold. More sodium ions enter the cell and further depolarization occurs. After which the sodium channels are inactivated due to the opening of voltage-regulated potassium channels and potassium moves out of the cell, returning it to it initial resting phase initiating repolarization. sodium channels regain their normal properties. a temporary hyperpolarization occurs which is a transient negative shift after an action potential occurs.
There are two different alleles for flower color, P and p. The image shows a purple sweet pea that is labeled with its two alleles for petal color. A purple sweet pea is labeled Upper P Upper P. Which is the genotype of the sweet pea?
Answer:
There is no diagram but the question can be answered using the description. The options to this question are:
Which is the genotype of the sweet pea?
A.heterozygous dominant
B.heterozygous recessive
C.homozygous dominant
D.homozygous recessive
The answer is C (homozygous dominant)
Explanation:
According to the question, a flower colour gene in a pea plant possesses two different alleles, P and p. Lettercase is used to illustrate that allele P (upper case) is dominant over allele p (lowercase) i.e P will be expressed over p in the flower colour gene.
According to the question, the pea plant exhibits a purple flower colour and is labelled as PP. This genotype is said to be homozygous because the same alleles (P) make up the plant's genotype. Since the allele P coding for purple coloration is dominant, the purple sweet pea is said to be HOMOZYGOUS dominant i.e. possess the same dominant alleles for that gene.
Answer:
[C] H D
(Brainly Marked It As An Inappropriate Word)
Explanation:
See Below
According to the calendar, it has been about 14 days since the beginning of the last lunar
cycle. Usually, the moon is bright white, but today a dark red moon hangs in the night sky.
What are you witnessing?
A. a northern light
B. a solar eclipse
C. a lunar perihelion
D. a lunar eclipse
Clarissa complained of shortness of breath and currently has a pacemaker. A myocardial perfusion imaging, tomographic (SPECT), multiple studies, was done. What is the appropriate CPT code for this procedure?
a. 78452
b. 78451
c. 78453
d. 78456
Answer:
a. 78452
Explanation:
Myocardial perfusion imaging is use to assess myocardial viability or to determine the extent of myocardial ischemia. SPECT systems is widely using now a days as imaging can be done in less than 10 minutes.
The appropriate CPT code for the procedure that Clarissa is undergoing is 78452. 78452 include multiple studies at stress or rest condition by providing injection of radionuclide in resting phase before taking resting images. This code also determine radioactivity distribution counts arising from certain areas such as anterior wall counts may be reduced.
Hence, the correct option is a. 78452
Explain the link between climate change and globalization.
Answer:
La globalización hace más vulnerable la economía al cambio climático. La susceptibilidad de la red económica global al estrés por calor de los trabajadores se ha duplicado en la última década, según concluye un nuevo estudio publicado en la revista 'Science Avances'
Explanation:
