Answers
2. 192
3. 437
4. 2
Related Questions
What is in the cloud of negatively charged particles that surrounds an atom?
O A. Neutrons
O B. Protons
C. Proteins
O D. Electrons
SUBME
Answers
Answer: the answer is Electrons
Explanation:
some animals are adapted to survive in very cold conditions such as the Arctic.
Explain how adaptions of Arctic animals help them to survive in cold conditions
Answers
Answer: they grow thick fur for insulation which is also oily and they have a layer of fat which keeps their get inside their body to keep them warm for longer
Explanation:
In an effort to identify the influence of genetic factors on both Type I diabetes and Type II diabetes, researchers calculated concordance rates for monozygotic twins. Concordance rates of 30–50% have been found for Type I diabetes and concordance rates of 80% for Type II. For both kinds of diabetes, dizygotic concordance rates were about 15%. What does this information suggest concerning the relative effect of genetic and environmental factors for each type of diabetes?
Answers
The provided question is incomplete as it lack the correct options to answer the question correctly however the correct options are as follows:
a) Environmental factors have no role in the occurrence of either type of diabetes.
b) Type II diabetes appears to be caused by a single, unidentified gene.
c) Genetic influences exert a larger role in Type II diabetes than in Type I diabetes.
d) Genetic factors have little or no role in the occurrence of Type I diabetes.
e) Type II diabetes is primarily determined by non-genetic factors.
Answer:
The correct answer option C.
Explanation:
Genetic factors influence the development of the type I and type II diabetes in monozygotic twins in the study by the concordance rates of 30 -50% and 80%. In both type of diabetes the genetic influences also present but comparatively low in dizygotic.
In this study the role of genetic influences are mentioned directly where is no information about environmental influences are present. It also suggests that the influences in Type II is higher than the type II diabetes.
Thus, the correct answer is option C.
A small group of people with several colorblind individuals move from the mainland move to a previously uninhabited, secluded island. Two hundred years later 5% of the people of the island have colorblindness. This is an example of:__________
Answers
Answer:
Founders effect
Explanation:
In population genetics, the founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. It was first fully outlined by Ernst Mayr in 1942, using existing theoretical work by those such as Sewall Wright.
(1)As a cloud of gas and dust collapses on itself and becomes more dense, the temperature at the center of the cloud
A, Increase
B, Decrease,
C, Stay the same.
(2)What is the first step in the nuclear fusion process?
A, two helium atoms combine to make one hydrogen atom
B, two hydrogen atoms combine to make one helium atom
C, two helium atoms combine to make one carbon atom
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Answer:
1. Option A.
Increase.
2. Option B.
two hydrogen atoms combine to make one helium atom
Explanation:
Stars formation occur In a cold or sense region called molecular clouds. It start when the fender part of the cloud collapse under gravity. The core tend to collapse first since they are denser than the outer cloud. As the collapse they form clumps and this intend form protostar and this process take 10 million years. As the center of the protostar is compressed, it heat up. The Temperature increases.
Nuclear fusion is a chemical reaction in which two lighter nuclei combines to form heavier nuclei. Two hydrogen atoms combine to form helium atoms
Transposons are movable elements of DNA that insert into new positions within the genome. A transposon may disrupt normal gene function, confer an evolutionary advantage, or have no effect on the organism.
A. Aquisition of a transposon carrying an adhesin gene into the Lactobacillus casei genome.
B. Acquisition of a transposon that disrupts.
C. Insertion of a transposon encoding a heat shock protein into the genome of a plant.
D. Insertion of a transposon into the gene encoding Factor VIII, an essential blood-clotting protein.
E. Undefined.
Answers
Answer:
The answer is incomplete because it is imperative to know what is the result of the transposition (i.e., deleterious, beneficial or neutral). For example, A and C options represent study cases where the insertion of Transposable Elements (TEs) may result beneficial for the organism.
Explanation:
Transposable Elements (TE) are mobile genetic elements that have the ability to move within the genome. According to their mechanisms of insertion, TEs are classified into two major classes: Class I (or retrotransposons) and Class II (DNA transposons), which are capable of moving by copy-paste (i.e., by a RNA intermediate) and cut-paste mechanisms, respectively.
Although originally were considered to be parasitic (deleterious) genetic mobile elements, nowadays it is well known that they may be sometimes beneficial depending on the localization of the TE insertion. For example, TE insertion into a protein-coding region (exon) sequence it is likely to produce protein disruption and thereby it has a deleterious effect. However, the insertion of TEs into upstream and intron non-coding regions may confer gene regulatory activity and be eventually beneficial to the organism.
If you place a paper towel in water, the water will move across the paper towel. Which of the following properties best explains why?
Answers
Answer:
- both cohesion and adhesion
Answer:
Both cohesion and adhesion
Roger is relieved that he does not have LQT7, which affects skeletal as well as cardiac muscle, causing short stature and scoliosis. He is also glad that he doesn't have LQT8, which causes many symptoms, or either of two types that also cause deafness. These other forms of the condition, with more than one symptom, exhibit:_____
a. invariable expressivity.b. complete penefrance.c. genetic homogeneity.d. pleiotropy.e. phenocopy.
Answers
Answer:
D) pleiotropy
Explanation:
Long QT syndrome is a type of syndrome which is characterized by having a long QT interval of the cardiac cycle.
Log QT syndrome occurs when the genes which control the formation of ion channels like sodium, potassium gets mutated as a result of which these channels are not formed or if formed are blocked. This slows down the ventricular repolarization as a result of which enough blood does not reach the organs.
The disease is genetical and is considered an autosomal recessive form. The gene for this is known as LQT and the associated genes are LQT7 and LQT8.
These associated genes produce additional symptoms along with long QT like short stature therefore these genes are considered pleiotropic where gene shows multiple effects.
Thus, Option-d is the correct answer.
what are two structural characteristics that triglycerides and phospholipids have in common
Answers
Answer:
The structural characteristics that phospholipids and triglycerides have in common are; 1. They both have fatty acids which vary in number whereby triglycerides has three fatty acids while phospholipids have two fatty acids and they both have a glycerol backbone
Explanation:
Which of the following is the best definition for a macromolecules
Answers
Answer:
There are no answers to choose from.
Explanation:
However, the prefix macro- means big, so the word macromolecule means large molecule. Macromolecules are also known as the molecules of life, they all contain carbon. The four macromolecules are carbohydrates, proteins, lipids, and nucleic acid. Carbohydrates are used as a quick energy source, they can be broken up into monosaccharides, dsaccharides, and polysaccharides. Proteins are used as catalyst to help speed up chemical reactions. Lipids are also known as fats, they can either be saturated or unsaturated. Nucleic acids contain information.
Examples of each:
Carbohydrate- Gluten
Protein- Lactase
Lipid- butter, or oil
Nucleic Acid- DNA or RNA
The best definition for a macromolecules is the most abundant elements found in living cells. The correct option is d.
What are macromolecules?A macromolecule, such as a protein or nucleic acid, is a very large molecule that is important in biophysical processes.
It is made up of thousands of atoms that are covalently bonded. Many macromolecules are polymers composed of smaller molecules known as monomers.
Macromolecules are essentially polymers, which are long chains of molecular subunits known as monomers.
Long polymers are found in carbohydrates, proteins, and nucleic acids. They are classified as macromolecules due to their polymeric nature and large size.
Macromolecules are made up of monomers, which are single units joined together by covalent bonds to form larger polymers. The most abundant elements found in living cells are the best definition for macromolecules.
Thus, the correct option is d.
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Your question seems incomplete, the missing options are:
a. a trace element
b. a vitamin
c. an organic molecule necessary for life
d. the most abundant elements found in living cells
Which parts of your body are made of proteins? Check all that apply.
A. Muscle
B. Skin, hair, fingernails
C. hormones (chemical messengers)
D. Enzymes like lactase
Answers
Answer:
A. Muscle
Explanation:
Answer:
Skin, hair, fingernails
Explanation:
Excluding water and fat, the human body is made up almost entirely of protein. Protein is the main component of muscles, bones, organs, skin, and nails.
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fungi are necessary evil to humanity. discuss the pros and cons this assertion
Answers
Answer:
Fungi are non flowering plants which has some benefits and also has some disadvantages.
Fungi is used as a source of food for humans and some lower animals. Fungi are also used to manufacture drugs in laboratories and act as a source of nutrients for plants in agriculture.
The disadvantages of fungi is its ability to cause spoilage of food and other perishable materials. It is known to cause diseases in plants as well as animals.
what happens when someone eats sodium metal
Answers
Answer
Explanation: As soon as sodium touches your tongue, hydrogen is released with tremendous heat. Most likely an explosion will take place in your mouth. So maybe it won't be a good idea to try it unless thats what you want
Three genes control the production of tail structures in dogs. The wag1 gene promotes the production of tail structures. However, the brkn gene inhibits wag1 activity. Another gene, ntrdr, stimulates activity of the brkn gene. Put these genes in order in a developmental pathway. Use arrows and t-bars between the genes as appropriate.
You conducted an experiment in which you knocked out the activity of the ntrdr gene in early embryological development. Will tail structures be produced by this animal?
a. Yes
b. No
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Answer:
1. ntrdr --> brken --| wag1 --> Tail structures
2. Yes
Explanation:
(1) In this experiment three different genes are present;
1) Wag-1 - promotes production of tail structures
2) brkn gene - inhibits Wag-1 which leads to inhibition or inactive Wag1 gene and there is no tail formation.
3) ntrdr gene - stimulates the activity of brkn gene thus this in turn inhibits Wag-1 gene and results in inhibiting the tail formation.
(2) The ntrdr gene stimulates the brkn gene and active brkn gene inhibits the wag-1 gene. As we know Wag1 gene is essential for tail formation. on removing out ntrdr gene result in inactive gene brkn thus allows the expression of the Wag-1 gene allowing tail growth in dogs.
apart from salary what other factors are considered before doing any work.
Answers
Answer:
smartness, working capabilities
stress taking abilities and most importantly personality.
Explanation:
I have answered as per my knowledge.
hope it helps ypu
Thetrophic level transfer efficiency (TLTE) is defined as the product of 100 and the quotient of production at the trophic level of interest and the trophic level one position lower. If the primary producers in a particular ecosystem provide 5000 kcal/m2/yr and the primary consumers in this ecosystem produce 1000 kcal/m2/yr, what is the TLTE for these two trophic levels in this ecosystem? (
Answers
Answer:
The trophic level transfer efficiency (TLTE) is 20 % for the producer and the primary consumer.
Explanation:
The trophic level transfer efficiency (TLTE) is calculated by dividing the value of primary consumer by the value of producer and multiply by 100. The value of 1000 is divided by 5000 and multiply by 100, we get 20 % which means that when the primary consumer eat producer, only 20% of energy is transferred in the body of primary consumer while the remaining 80% energy will be lost as heat energy in the ecosystem.
High levels of mercury contamination have entered the aquatic ecosystem primarily through:
a
Medications like vaccines which contain mercury and subsequently enter the drainage systems through human waste.
b
Emissions from coal burning power plants which then rain down on waterways.
c
Merurcury solutions which are used in plastic production and then disposed of through waste water.
d
Paper productions which uses mercury in a bleaching process to whiten the paper.
Answers
Answer:
The answer is B. Emissions from coal burning power plants which then rain down on waterways hopefully this helps!
Which of these is a part of the process of speciation?
O A. Living in a stable environment
O B. Interbreeding between species
O C. Increased gene flow
OD. Divergence in genetie traits
Answers
Answer:
d
Explanation:
Speciation is the formation of new species as a result of evolution these three stages are separation, adaptation, and reproductive isolation. First Stage: Separation. Speciation usually begins when a part of a population becomes separated from the rest of their species.
d
How would the human population be different if crossing over did not happen during meisosis?
Answers
Without crossing over, each chromosome would be either maternal or paternal, greatly reducing the number of possible genetic combinations, which would greatly reduce the amount of genetic variation between related individuals and within a species.
And as genetic variation decreases, the species has a very less chance to evolve and adapt as natural selection.
When a population is split into smaller groups, why do these groups develop
different traits?
A. Evolutionary mechanisms work the two subgroups
independently
B. Separating the two groups decreases the chance that the two
groups will diverge.
C. Gene flow is increased in the two subgroups that are formed.
D. Traits that form in one group from evolutionary forces quickly
spread through both populations.
Answers
Answer: A. Evolutionary mechanisms work the two subgroups independently.
Explanation:
Speciation can be defined as the process by which new species develop from the pre-existing species. It occurs when the members of the same species get separated. The separated members become reproductively isolated and diverge.
The speciation of two separated members will take place individually due to the development of new traits according to the need of new habitat and other survival conditions. Thus evolutionary mechanism will work independently for the two subgroups.
Answer:
i did it
Explanation:
If 300 blue jays are found in a 20 hectare plot, what is the population density?
Answers
Answer:
15 blue jays per 1 hectare
Explanation:
==>Given:
A population of blue jays (N) = 300
Area of land (A) = 20 hectares
==>Required:
Population density (D)
==>Solution:
Population density can be defined as the number of members of a population dwelling in a unit area.
The formula is given by:
Population density (D) = Population (N) ÷ Area (A)
Thus, D = 300 ÷ 20
D = 15
Population density of blue jay = 15 blue jays per 1 hectare
Products and components to other products are made on complex conveyor belts that run along the factory floor. There are two types of conveyor belts in this factory. One type of conveyor belt has many complex machines working along it; the machines are very efficient but only make a few types of products. This type of conveyor belt represents the_____________.
Answers
Answer:
The answer is rough endoplasmic reticulum.
Explanation:
If we apply this analogy to the cellular structures, the type of conveyor belt explained in the question represents the rough endoplasmic reticulum. Because it has a complex structure made up of membrane and ribosomes and it produces only a limited number of proteins just like the very efficient conveyor belt that produces only a few products.
I hope this answer helps.
Is a glucose molecule a monomer of starch and cellulose?
Answers
Answer:
Starch and cellulose are two very similar polymers. In fact, they are both made from the same monomer, glucose, and have the same glucose-based repeat units.
Explanation:
Unplanned, rapid urban growth can create what problem?
A: elimination of invasive vegetation
B: desertification of farmland
C:rangeland damaged from overgrazing
D:infrastructure that cannot adequately support the population
Answers
Answer:
D: infrastructure that cannot adequately support the population
Explanation:
When urbanization is unplanned and rapid that will lead to a poor infrastructure which will be unable to support the population.
Unplanned and rapid urban growth will not have enough infratructure or organizational structures that will lead to poverty and poor water and waste managemnet system that will lead to communicable diseases and will be unable to support the population.
Hence, the correct option is D.
definiton of
chloroplast
Answers
Answer:
Chloroplasts are small organelles inside the cells of plants and algae. They absorb light to make sugar in a process called photosynthesis. The sugar can be stored in the form of starch. Chloroplasts contain the molecule chlorophyll, which absorbs sunlight for photosynthesis.
Answer:
What is "Chloroplast"? Well, Chloroplast is the green plant cells inside of a plant in which photosynthesis would take place in!
Explanation:
I love biology, to help explain it better.
Have a good day!..✋
The beaker contains a 25% salt solution and the bag contains pure water. What is the concentration of water in the beaker
Answers
Answer:
75%
Explanation:
100-25=75%
Tetrodotoxin is a potent toxin found in a variety of organisms including the pufferfish. The toxin binds to the extracellular side of the voltage-gated Na+ channel and prevents channel opening. This leads to paralysis of muscles, including the diaphragm. Death from respiratory failure can occur after ingestion of as little as 1 mg of the toxin. How does this toxin cause paralysis? Choose one: A. The axon membranes continue to depolarize since sodium cannot leave the cell. This causes the cell to become overloaded and dysfunction. A signal is not sent to the muscle, so the muscle cannot contract. B. Sodium cannot enter and cause the membrane to depolarize. The action potential cannot be sent along the axon, so the neuron does not send a signal to the muscles. Thus the muscles are paralyzed. C. Since sodium cannot enter through its normal channel, the sodium ions flood through the potassium channels, causing an imbalance in ions. This imbalance causes too many signals to be sent to the muscle, leading to paralysis.
Answers
Answer: Option B.
Sodium cannot enter and cause the membrane to depolarize. The action potential cannot be sent along the axon, so the neuron does not send a signal to the muscles. Thus the muscles are paralyzed
Explanation:
Tetrodotoxin is a neurotoxin that is found in the liver and gonads of Marine organism. it block sodium channels and the consumption of organisms that has it can cause neurological and gastrointestinal disorder. It is produced by some infecting or symbiotic bacteria like Pseudoalteromonas, Pseudomonas, and Vibrio as well as other species found in animals.
Tetrodotoxin stop signals transmission from nerves to muscles by blocking the sodium channels and muscles in contracting for nervous stimulation. This in turn cause rapid weakening and paralysis of the muscles which include that of the respiratory tracts and can result to arrest or death.
Refer to Infographic below. On the Galápagos Islands, the finches that Darwin studied tended to have either small beaks or large beaks. The smaller beaks are best at eating soft seeds but are ineffective at cracking large seeds. The larger beaks are best at cracking hard seeds. Beaks of intermediate size are inefficient for either seed type. Use the Infographic to identify and name which result of natural selection is at work in this example.
Answers
Answer:
Disruptive selection
Explanation:
According to the infographic that is attached below showing different the three main types of selection that occurs as a result of natural selection taking its course on any population, we can draw our conclusion regarding the information given to us from the question.
From the question above, it states that the finches studied by Darwin are majorly finches with either small beak or large beak which are all adapted to suit the type of food available for the finches in the islands. Whereas, finches with intermediate beaks are favored against.
According to the infographic, disruptive selection can be said to have taken place as extreme traits are favored against intermediate traits on the islands.
A trout population grew from 4 in 1992 to 16 in 1993 and then to 64 in 1994. If it continued to grow exponentially, approximately how many trout were there in 1995?
100
Answers
Answer:
256
Explanation:
==>Trout population:
In 1992, we have 4
In 1993, we have 16
In 1994, we have 64
==>Required:
Population if trout in 1995
Thus, since we are told that the population growth is exponential, and looking at how the popuation increased from 1992 to 1994, we can see that the population increased yearly in the multiples of 4.
=> 4, 16, 64, ?
The next number in this series of exponential growth which represents the population in 1995 would be 256. I.e. (4)⁴ = 4*4*4*4 = 256
Population of trout in 1995 = 256
Answer:
256 trouts
Explanation:
There would be about 100 trouts in 1995.
When a population grows exponentially, it means that the number of individuals in the population grows at a constant proportion relative to the original population.
The population of trout according to the illustration grows exponentially by multiplying by 4 every year. Hence, if there were 4 in 1992,
by 1993: there were 4 x4 = 16 trouts
by 1994: there were 16 x 4 = 64 trouts
by 1995: there would be 64 x 4 = 256 trouts.
Cellular respiration ________. Group of answer choices releases carbon dioxide and water results in a net consumption of energy involves a net consumption of water represents a decrease in entropy requires the green pigment chlorophyll
Answers
Answer:
Cellular respiration releases C02 and water. This process leads to production of energy as ATPs. The objective is to extract the energy trapped in glucose and other metabolites. It begins in the cytoplasm and ends in the mitochondrial of cells. Since it involves liberation of energy as a spontaneous reaction, it has a positive entropy. It does not involves the use of Chlorophyll.
C02 and water as byproducts are given out during Kreb'scycle.
Explanation: