How would the human population be different if crossing over did not happen during meisosis?
3. Which of these organs is directly involved in
synthesis of red blood cells in an adult?
A. Liver
B. Spleen
C. Bone marrow
D. Lymph nodes
what happens when someone eats sodium metal
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
If you place a paper towel in water, the water will move across the paper towel. Which of the following properties best explains why?
Answer:
- both cohesion and adhesion
Answer:
Both cohesion and adhesion
The four organic molecules are listed below. Which ones do you get from the foods you eat? Check all that apply.
Carbohydrate
Nucleic Acids
Proteins
Lipids
Answer:
Carbohydrate, proteins, and lipids
Explanation:
The organic molecules that can be derived from eating foods are carbohydrate, proteins, and lipids.
Carbohydrates are general derived from starchy foods such as grains, proteins are derived from eating of foods that are rich in proteins such as meat, milk, etc, while lipids are derived from eating fat/oil-based foods such as butter, avocados, etc.
Nucleic acids are not derived directly from foods. They are monomers of proteins and hence, they are only derived from breaking down proteins.
List the types of UV radiation
from least harmful to most
harmful.
Explanation:
UVC (100-280 nm)
UVB (280-315 nm)
UVA (315-400 nm)
The UV radiation from least harmful to most harmful is UV-A, UV-B, and UV-C. The correct option is A.
What is UV radiation?The sun and artificial sources, such tanning beds, both emit ultraviolet (UV) radiation, a type of non-ionizing radiation.
Although it helps humans in some ways, such as by producing vitamin D, there are also potential health hazards. The sun is a natural source of UV radiation for us.
UV rays come in three varieties: UVA, UVB, and UVC. Despite being the least powerful, UVA rays hasten the ageing of skin cells.
Sunburns and skin cancer can be brought on by UVB rays, which are a little stronger. Sun UVC rays are absorbed by ozone and do not go to the ground.
Thus, the correct option is A.
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________1. The part of a photosystem that absorb light energy is its:
A. Thylakoid lumen C. Reaction center
B. Pigment –building protein D. Antenna complexes
Answer:
A. thylakoid lumen
Explanation:
option A is correct answer
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
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.
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.
Answer:
The answer is B. Emissions from coal burning power plants which then rain down on waterways hopefully this helps!
EASY QUESTION! An object has a density of 2.5g/cm. Will this sink or float in water?
Answer:
it will sink
Explanation:
water has density of 1 g/cm³
the object has density 2.5 g/cm³
It will sink in water as much more dens
Answer:
The object will sink.
Explanation:
The density of water is 1 g/cm^3
The density of the object is 2.5 g/cm^3
---which is greater than that of water.
Which of the following is the best definition for a macromolecules
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
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.
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.
The beaker contains a 25% salt solution and the bag contains pure water. What is the concentration of water in the beaker
Answer:
75%
Explanation:
100-25=75%
A 10 kg bowling ball is lifted from the ground to a height of 1 meter. Assuming the bowling alley is on Earth, which type of potential energy is stored in a ball and why?
Answer:
961.052
Explanation:
Mass x gravity x height
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
Answer: the answer is Electrons
Explanation:
If 300 blue jays are found in a 20 hectare plot, what is the population density?
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
apart from salary what other factors are considered before doing any work.
Answer:
smartness, working capabilities
stress taking abilities and most importantly personality.
Explanation:
I have answered as per my knowledge.
hope it helps ypu
fungi are necessary evil to humanity. discuss the pros and cons this assertion
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.
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
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.
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.
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.
Explore the evidence supporting commonly held beliefs about proteins. 1. Gluten is toxic for everyone and should be avoided — no amount of gluten in the diet is considered safe. 2. Athletes and people who are very physically active need to eat a lot more protein than the average person. 3. Most Americans don't get enough protein in their diet
Answer:
Support the answer with the third point but mention not too take too much or they'd die.
Explanation:
Proteins are essential for the main physiological processes of life and perform functions in every system of the human body.
A protein’s shape determines its function.
Proteins are composed of amino acid subunits that form polypeptide chains.
Enzymes catalyze biochemical reactions by speeding up chemical reactions, and can either break down their substrate or build larger molecules from their substrate.
The shape of an enzyme’s active site matches the shape of the substrate.
Which are ways that many countries transport surface waters
Answer: Most of the surface water is transported from one place to another in two ways in general. One way being the pipelines, and the other being the conventional transportation vehicles.
Explanation: pipelines or vehicles
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?
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.
what will happen when tendons is removed
Answer:
Tendon release, also known as tenotomy, is a surgical procedure that involves cutting through or disconnecting a tendon to allow for a greater range of movement.
The procedure is used to relieve tight or shortened muscles. In some cases, the tendon is re-routed to maintain muscle function.
This procedure is usually reserved for conditions that don’t respond well to conservative nonsurgical treatments. Tendon release surgery is ideal for infants with clubfoot, or for older patients who develop tightened or shortened muscles due to cerebral palsy or other neuromuscular disorders.
WILL GIVE BRAINLIEST ANSWER TO WHOEVER ANSWERS FIRST AND CORRECT
Is a glucose molecule a monomer of starch and cellulose?
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:
(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
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
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
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:
definiton of
chloroplast
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!..✋
Explain why hormones are able to travel through the body but only affect certain cells.
Answer:
Hormones are able to travel the body but only affect certain cells because only those target cells have receptors for that particular hormone. Some hormones bind to receptors on the surface of target cells. Others enter the cells and bind to receptors in the cytoplasm or nucleus.
