Answer:
Semi-conservation replication describes the mechanism of DNA replication in all known cells. This process is known as semi-conservation because two copies of the original DNA molecule are produced. Each copy contains one original strand and one newly-synthesized strand.
DNA is passed down to the next generation in big chunks called: Chromosomes.
Every generation, each parent passes half their chromosomes to their child. If nothing happened to the chromosomes between generations, then there would be around a 1 in 8 change that you would get no DNA from a great, great, great, great grandparent.
What most people forget, through, is that our chromosomes get mixed and matched before they are passed on. It is because of this "recombination" that your great, great, great grandparent's DNA is almost cetainly still lurking in yours.
Explanation:
I majored in Biology
Can someone help me please!!!
Describe the effect on an enzyme of an increase in environmental temperature above the optimum temperature range of the enzyme.
Answer:
In an environmental temperature above optimum temperature will cause the enyzmes to denature (deform), because when they denature the subtrate will no longer fit into the enzyme
The effect on an enzyme of an increase in environmental temperature above the optimum temperature range of the enzyme - denature the enzyme and lose the specific shape of the enzyme leads to losing its activity.
An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process
Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction.extremely high temperatures above the optimum temperature can cause an enzyme to lose its shape (denature) and stop workingThus, the effect on an enzyme of an increase in environmental temperature above the optimum temperature range of the enzyme - denature the enzyme and lose the specific shape of the enzyme leads to losing its activity.
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natural selection is an example of a mechanism of evolution. does this mechanism produce a change in individuals or population? explain
Natural selection refers to the procedure where the species better amended to their surrounding appear to survive and generate more offspring. Natural selection refers to one of the mechanisms that make modifications in the frequencies of genes in populations and thus, it is the mechanism of evolutionary change.
However, the phenomenon of genetic drift and natural selection cannot take place unless and until there is a genetic variation, that is unless some individuals are genetically distinct from others.
A man with blood group B marries with a woman with blood group AB and the daughter has blood group AB. Is this information enough to tell you which of the traits – blood group B or AB is dominant? Why or why not?
Answer:
YES. This information is enough to assume that neither of the blood groups dominates over the other one.
Explanation:
Available data:
A man with blood group B ----> Genotype IBIB or IBiA woman with blood group AB ---> Genotype IAIBTheir daughter has blood group AB --> Genotype IAIBThe fact that the daughter´s genotype is IAIB tells us that she got the IA allele from the mother, who is IAIB, and the IB allele from his father, who is IB-.
If blood type B was dominant over A or AB, then the daughter should have Blood type B. If blood type A was dominant over B or AB, then the daughter should have Blood type A. Blood type AB tells us that both types are being expressed, A and B.The fact that the daughter inherited one type of allele from each parent, but she is expressing the blood type AB, suggests that neither of the alleles dominates the other one. This is an example of co-dominance, where the heterozygote phenotype is an additive expression of both of the parents' genes.
This is enough information to assume that neither of the blood groups dominates over the other one.
Please answer the following statement:
Where is the cell below (which colored box) is Transcription occurring? __________
Where is the cell below (which colored box) is Translation occurring? _________
Thank you for your help I really appreciate it!
Answer:
Transcription occurs in the nucleus.
Translation occurs at the ribosome in the cytoplasm.
Phototropism occurs when a plant bends in the direction of a light source. A common light source is the Sun. The plant hormone auxin is released in response to the Sun. What causes the plant to bend toward the light?
A.The hormone auxin causes cells on the shady side of the plant to elongate.
B.The hormone auxin causes cells on the lighted side of the plant to elongate.
C.The hormone auxin causes cells on the shady side of the plant to shrink.
D.The hormone auxin causes cells on the lighted side of the plant to shrink.
Answer:
A.
Explanation:
Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs.
A hurricane passes through the Gulf of Mexico and destroys many of the coastal regions of Northwest Florida,
Which of the following is a likely impact of this catastrophic event on biodiversity?
Species brought in by the storm surge will displace species native to the coastal wetlands.
Species reliant on coastal wetlands for survival may experience a decline in population due to loss of
habitat.
Coastal wetlands will grow exponentially with the input of nutrients from storm upwelling and biodiversity
will increase in these areas.
Excessive salt from the storm surge will flood coastal wetlands and raise salinity to intolerant levels for the
local species, causing a decrease in biodiversity
Answer:
Species reliant on coastal wetlands for survival may experience a decline in population due to loss of
habitat.
Explanation:quizlet said so
help me plzzz. I’m kinda clueless lol.
the answer is b.
hope this helps lol
Answer:
Deposited
Explanation:
yuh
PLEASE HELP!!!!!!!!
Complete the following sentence.
While all of the food crops contribute to nutritional health, __________ are the most important to the prevention of famine conditions.
Answer:
Humanitarian aid is the most important to the prevention of famine conditions
help me pls): i dont get this one
Answer:
A poor family enjoying each others company
Explanation:
Answer:
It looks like they are an immigrant family of african americans who are on road to travel someplace else.
what is the reproductive organ of ferns
A. Cone
B. Stem
C. Fronds
D. Flowers
Answer:
Stems are the reproduction organ of ferns I think.
Can you tell me about cellular respiration and photosynthesis? I do not understand.
Answer:
Photosynthesis is the process in which plants make their on food; Cellular respiration is the process through which cells convert sugars into energy.
Explanation:
Answer:
the job of photosynthesis is to turn energy from the sun into chemical energy that can be used for food. Cellular respiration is the cycle that occurs in the mitochondria of organisms to break down sugar in the presence of oxygen to release energy
Explanation:
A kid on a trampoline has 1,000 J of potential energy when they are at the top of a jump. How much kinetic energy will the kid have when they come halfway down?
A. 100 J
B. 250 J
C. 500 J
D. 1000 J
Answer:
C. 500 J
Explanation:
Given;
potential energy of the kids at the top of the trampoline, P.E = 1,000 J
⇒At the top of the trampoline, the kids have only potential energy.
⇒On half way down, the kids have both kinetic energy and potential energy.
⇒At the bottom of the trampoline, the kids have only kinetic energy.
Based on the statements above, the kinetic energy of the kids half way down is calculate as;
P.E + K.E = 1000 J
Base on law of conservation of energy, P.E = K.E
2 K.E = 1000 J
K.E = ¹/₂ x 1000 J
K.E = 500 J.
how many chromosomes does a human cell hold
Answer:
Humans have pair of 23 pairs of chromosomes in total is 46 so 46 is your answer
Which of the following does not exist during prophase?. Single choice.
A. Condensation of chromatins
B. Disappearance of nuclear membrane
C. Pairing of homologous chromosome
D. Chromosomes lined up in the middle of the cell
Option 2
Answer:
Option B.
Disappearance of nuclear memberane.
Explanation:
This is because Prophase is marks the beginning of mitosis, and it is the process where replicated genetic contents are separated into daughter cells. During prophase, ttgere is condensation of chromatin. The chromatin coils and it become compact, which lead to the formation o chromosomes that are visible. The sister chromatids are joined together at the centromere. The mitotic spindle begins to form. The mitotic spindle is consist of long proteins called microtubules that firms at opposite end. The spindle separate the two sister chromatids.
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EXPLAIN HOW A DEER TICK COULD INFECT YOU WITHOUT YOU REALIZING IT
Answer:
Because ticks stay attached to hosts, blood feeding for several days, they secrete novel pain killers, called kininases, in their saliva which help them go unnoticed. If you have been bitten previously, you may notice a small red bite mark, which can be itchy.
Explanation:
Answer:
The deer tick is tiny, no larger than a pencil point.
Explanation:
Most tick bites are harmless and don't need medical treatment. But some ticks (like the deer tick, wood tick, and others) can carry harmful germs that cause diseases like Rocky Mountain spotted fever and Lyme disease. The deer tick is tiny, no larger than a pencil point. Which mean it could bite you without you realizing it.
proteins regulate cell process, transport substances into or out of cells, and help
a. regulate blood pressure
b. form bones and muscles
c. control body temperature
d. regulate pH in various parts of the body
Answer:
B
Explanation:
I think it's B since proteins don't control blood pressure or temperature. Also I'm pretty sure they don't regulate the body's PH
all living things are classified into kingdoms based on specific characteristics. which of the following are only characteristics to the bacteria domain
Answer:
Eukaryotic cell, cell wall made of cellulose present
Explanation:
took the test
The main characteristics of the bacteria domain is that they lack a well-defined nucleus and are known as prokaryotes.
What is the main characteristic of the bacteria domain?All living things are classified into kingdoms based on specific characteristics found in organisms in that kingdom.
For the bacteria kingdom, the main characteristic present is that they lack a well defined nucleus as well as nuclear membrane.
Organisms without a well-defined nucleus are known as prokaryoytes.
Thus, the main characteristics of the bacteria domain is that they lack a well-defined nucleus and are known as prokaryotes.
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Which of the following is not a benefit of green revolution?
A) new crop varieties
B) increased crop yields
C) cost effective
D) new crops may require larger amonts of water than the previous ones.
Answer:
D new crops may require larger amonts of water than the previous ones.
Explanation:
because i got it right on my test
There is ice in an ice cube tray. At what temperature did the water freeze? A.0°F c.32°C b. 0°C
Answer:
the ice froze at 0 celcius!
Explanation:
Which layer of rock is the oldest?
1. Layer A
2. Layer D
3. They are all the same age
4. There is not enough information to answer this question
As a cell grows larger, what happens to the surface area-to-mass ratio?
Answer:
The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. ... That is why cells are so small.
Explanation:
If the cell expands beyond a certain size, not enough material can cross the membrane quickly enough to accommodate the increased cellular volume.
What is surface area-to-mass ratio?The surface area to volume ratio is simply the surface area divided by the volume of an object. It expresses the proportion of surface area per unit volume of an object, such as a sphere or cylinder.
Smaller single-celled organisms have a high surface area to volume ratio, allowing them to survive by diffusing oxygen and material into the cell and waste out.
The greater the surface area to volume ratio, the more efficient this process can be.
Smaller cells have a much higher surface area to volume ratio, allowing material to diffuse quickly and efficiently throughout the entire volume of the cell.
Thus, the surface area to mass ratio will be smaller as a cell grow larger.
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plssss help with #10 & 11
Choose whether each statement describes an epiphyte or a hydroponic plant. Select the options in the table.
epiphyte plants
hydroponic plants
receives nutrients from air and water
mineral and nutrient solution is in water
grows on other plants
known as air plants
plants grown with water but without soil
Answer:
b and. c. ho0e i helpefxa
where do convection currents occur
need help fast
Answer:
Convection currents occur in the Earth's mantle.
Answer:
in the mantle of the earth
Explanation:
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Answer:
I think c
Explanation:
I hope your help
3. What methods are you using to test this hypothesis? Outline the steps of the procedure in full sentences.
Answer:
1. Specify the Null Hypothesis.
2. Specify the Alternative Hypothesis.
3. Set the Significance Level
4. Calculate the Test Statistic and Corresponding P-Value.
5. Drawing a Conclusion.
Explanation:
:)
Answer:
1. Specify the Null Hypothesis.
2. Specify the Alternative Hypothesis.
3. Set the Significance Level
4. Calculate the Test Statistic and Corresponding P-Value.
5. Drawing a Conclusion.
Explanation:
got 100%
which elemet are metal
Answer:
ELEMENT
Neptunium
Plutonium
Americium
Curium
By definition, a metal element is an element that form positive ions and has metallic bonds. Most elements on the periodic table are metals. Examples of metal elements include iron, copper, silver, mercury, lead, aluminum, gold, platinum, zinc, nickel and tin
Explain how different forms of a gene are distributed to
offspring.
Answer: During gamete formation, the alleles for each gene segregate from each other, so that each gamete carries only one allele for each gene. an individual gene may code for a specific physical trait, that gene can exist in different forms, or alleles.
What are genes?
Genes are an basic physical and functional unit of heredity.Genes are what make our DNA.
Hope this helps
-Tobie the dog
How are organelles similar to the organs found in your body
Answer:
The digestive system of the human body is made up of several organs that work together to break down food so it can be used in the body. Similar organelles in the cell are endoplasmic reticulum, ribosomes, and the golgi body.
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