Answer:Deoxyribonucleic acid is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid are nucleic acids.
Explanation:
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU !!!
Answer:
sedimentary basins hope it helps
How can a poly genic trait be easily identified
Answer: The presence of the polygenic trait masks the other possible alleles involved. There are only two possible phenotypes for the trait. The graphing of the possible phenotypes results in a bell curve. Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be many different sizes. Height is a polygenic trait, controlled by at least three genes with six alleles. If you are dominant for all of the alleles for height, then you will be very tall.
Explanation:
musclers responsible
Evolution is likely to occur in all of the following scenarios except
A.
in a rapidly changing environment
B.
in an environment with a lot of competition
C.
when food is abundant
D.
when the same antibiotic is used repeatedly
Answer: C. when food is abundant
Explanation:
what impact does the environment have on the environment?
Answer:
The environment will impact positively if the human activities are positive and negative if the human activities are negative. It is worthy of note that our actions and activities contribute greatly to the way and manner our environment response to us.
Which system is responsible for creating red blood cells?
a
skeletal
b
muscular
c
nervous
d
circulatory
An immunodeficiency condition called bare lymphocyte syndrome is caused by a genetic defect that results in an inability to synthesize MHC class II molecules.
a. True
b. False
Answer:
True
Explanation:
This is because lymphocyte syndrome is a genetic condition where there is absence of or in ability of the cell to express histocompatibility complex class II or MHC class II and this lead to incapability of the immune system to fight infections. The immune system is compromised and weakened to fight infections.
Roger Sperry cut a newts optic nerve and rotated the eye. Axons from what used to be the dorsal part of the retina (now located on the ventral side) grew back to the target areas: Select one: A. that ordinarily get input from the ventral retina. B. equally and diffusely. C. that ordinarily get input from the dorsal retina. D. that ordinarily get input from the center of the retina.
Answer:
C
Explanation:
that ordinarily get input from the dorsal retina
1.Write the equation for light dependent reaction of photosynthesis
2.Write the Equation for light independent reaction of Calvin cycle?
Answer:
1. The overall chemical equation of the light-dependent reactions is given below:
12 H₂O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll ----> 6 O₂ + 12 NADPH + 18 ATP
2. The overall chemical equation for the light-independent reactions of the Calvin cycle is given below :
3 CO₂+ 6 NADPH + 5 H₂O + 9 ATP → glyceraldehyde-3-phosphate (G3P) + 2 H+ + 6 NADP+ + 9 ADP + 8 Pi
Explanation:
1. The light-dependent reactions convert light energy into chemical energy, producing ATP and NADPH which are used light-independent reactions to drive the synthesis of sugar molecules from inorganic CO₂ and water. Light-dependent reactions takes place in photosystem I and II. Photosystem I and Photosystem II ( PS I and PS II) are the two biochemical systems, active in chloroplasts, that serve as sites of electron transfer reactions in photosynthesis. Energy from sunlight is used to split water which releases electrons and hydrogen atoms which are transferred to NADP+ to produce ATP and NADPH and oxygen is produced as a waste product.
The overall chemical equation of the light-dependent reactions is given below:
12 H₂O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll ----> 6 O₂ + 12 NADPH + 18 ATP. Note that Pi refers to inorganic phosphate
2. The Calvin cycle refers to the light-independent reactions in photosynthesis. It occurs in three stages.
Stage 1 (Carbon fixation): In this first stage of the Calvin cycle, light-independent CO₂ is fixed by enzyme called ribulose bisphosphate carboxylase (RuBisCO) to ribulose bisphosphate (RuBP) to form glyceraldehyde-3-phosphate.
Stage2: ATP and NADPH are used to reduce 3-phosphoglycerate (3-PGA) into glyceraldehyde--phosphate (G3P). ATP and NADPH are used up in the process and are converted to ADP and NADP+, respectively.
Third stage: RuBP is regenerated, which enables the system to prepare for more CO2 to be fixed.
The overall chemical equation for the light-independent reactions of the Calvin cycle is given below :
3 CO₂+ 6 NADPH + 5 H₂O + 9 ATP → glyceraldehyde-3-phosphate (G3P) + 2 H+ + 6 NADP+ + 9 ADP + 8 Pi
You walk up to the crime scene. A dead body is lying on the bank of the river, just a few miles outside of the city. There is a bullet wound on the victim’s chest where it appears a bullet entered the body. There are a few bullets that have been found scattered near the body of the victim. You can see that a gun is resting on the bottom of the river in the shallow end near the shore.
1. Discuss the first things you should teach your new partner to do as you approach the crime scene.
2. Explain how you and your partner should go about handling the gun found at the bottom of the river? What are some things to keep in mind?
3. How should you and your partner go about handling the bullets found near the body of the victim?
4. What information might you be able to find from the gun and bullets found at the crime scene?
5. As we know, it is very important to handle evidence at a crime scene properly. If clues and evidence are mishandled, it could ruin an entire investigation! Conduct some additional online research on your own. Find an article that describes a crime scene where evidence was mishandled. Share the link to the article you found and write a paragraph or two to describe how the scene was mishandled and how this impacted the case. Include advice on how the investigation could have been better managed and how the scene and evidence should have been handled.
Answer: 1.
As the first responder, you should:
Explanation:
Protect the crime scene.
This means that the first responder should protect the public and the crime scene and also control the changes made to the crime scene to the best of their ability.
Protection of the public means the evacuation of the public from the crime scene to a safer area.
The crime scene should be protected against evidence distortion.
The control of changes made to the crime scene maintains the original evidence present at the crime scene.
2.
Answer:
Fire arm safety measures shall be taken
The gun should not be transported by placing a pencil in the barrel or inside the trigger guard.
There shall be documentation of the location of the gun.
Photos of the location of the gun should be taken.
There after the gun shall be retrieved from the river safely.
Since the gun shall be wet at the time of collection, it shall be kept in a plastic bag.
The gun shall then be transported to the evidence receiving area.
The gun should not be held in the plastic bag for more than two hours since this could lead to the growth of microorganisms which can destroy evidence.
3
Answer:
Things to keep in mind
Fire arm safety mechanisms should be put in place.
Evidence packed in plastic material should not be held in the packing material for more than two hours.
Only large quantities of dry powder should be collected and stored in plastic bags.
Any items which may cross contaminate each other must be packaged separately to avoid evidence contamination
The containers should be closed and secured to avoid the mixture of evidence during the transportation process.
Each container should have:
The collecting person's initials
Date and time it was collected
Complete description of the evidence and where it was found
The investigating agency's name and their file number.
4
Answer
Bullets from near the body of the victim should:
Be packaged separately and placed in paper envelopes or small cardboard pillboxes.
Handled carefully to prevent alter of evidence such as fingerprints.
The bullets have to be submitted to the crime lab for identification of any evidence present on them that could help in investigation.
Be kept safe and separate from the gun.
The container should be labeled to warn that the contents are precautions should be taken to prevent anyone from being injured.
5
Answer:
The gun and bullet might help us out in finding out:
The fingerprints of the user: The gun can be checked to retrieve the fingerprints of its handler if any.
The bullet cartilages shall reveal the owner of the bullets, this shall lead to the identification of a suspect.
Blood, hair that might be found on the gun and bullets might help in DNA analysis. This shall in turn lead us to a suspect.
The guns registration number shall lead us to the owner of the gun used thereby the suspect in the crime.
6
Answer:
The officer who arrested Oscar Pistorius on the night Reeva Steenkamp was killed last year testified Friday that police at the crime scene mishandled evidence, including a ballistics expert who handled the murder weapon without gloves.
This in turn led to confusion in evidence of the case.
The police should have instead used gloves in handling the pistol at the crime scene.
This would have prevented the intoxication of evidence.
Explanation:
View the slides on the PowerPoint to match each of the cell structures with the correct letter labels for each of the following cells. Elodea Cell Cell wall _____ Chloroplast ____ Area of vacuole ___ Onion Cell Cell wall ___ Nucleus ___ Mitochondria ___ Cheek Epithelial Cell Cell membrane ___ Nucleus ___ BacteriA Bacterial Cells. View the bacterial cells on the PowerPoint and identify which cell (A, B, or C) is: Coccus ____________ Bacillus ____________ Spirillum ____________ Protista Amoeba can move via the extension of finger-like projections called pseudopodia, what prevents plant cells from moving in the same fashion? How does the euglena compare to both plant and animal cells (i.e. - explain what structure(s) might make it similar to plants and what structures might make it similar to animals).
Answer:
10. View the slides on the PowerPoint to match each of the cell structures with the correct letter labels for
each of the following cells.
Elodea Cell Cell wall _B____ Chloroplast _A___ Area of vacuole _C__ Onion Cell Cell wall _B__ Nucleus __A_ Mitochondria _C__ Cheek Epithelial Cell Cell membrane _B__ Nucleus __A_ BacteriA Bacterial Cells. View the bacterial cells on the PowerPoint and identify which cell (A, B, or C) is: Coccus ________B____ Bacillus ______A______ Spirillum ______C______ Protista Amoeba can move via the extension of finger-like projections called pseudopodia
Explanation:
Amoeba can move via the extension of finger-like projections called pseudopodia, what prevents plant cells from moving in the same fashion?
Ans: The plants that prevent the information of pseudopodia have rigid cell walls. which is unlike to amoeba.
How does the euglena compare to both plant and animal cells (i.e. - explain what structure(s) might make it similar to plants and what structures might make it similar to animals).
Ans: Euglena are similar to plants because they both have chloroplast and are similar to animals because neither has a cell wall.
The 2011 earthquake triggered a ... Question 3 options: hurricane volcano tsunami sand storm
At the equator, what kind of pressure will you most likely find?
The weather map shows air pressures in millibars.
1008
1004
1.004
1008 21004
1008
1004
Logs
-1000
1000
1000T
1-004
19.00 1000
2008
996
T004
2004.
2004
1008
Which set of conditions best describes the weather at the area of lowest air pressure?
O A.) Bright sun with no wind
O B.) Partly cloudy with no wind
O C.) Mostly sunny with light winds
O D.) Overcast skies with strong winds
Answer:
I think it is A.) Bright sun with no wind
Explanation:
It has no wind or clouds not a lot of air pressure.
Can I please have Brainliest?
A group of researchers are monitoring the health of a salt marsh. They
measure high levels of nitrates and phosphates in the sediment of the marsh
but not in the water samples. In this instance, which ecological service is the
marsh providing?
A. coastal land
B. Aquatic habitat
C.Flood protection
D. Water purification
Answer:
It is D
Explanation:
Trust me I've taken it already, and plus it talks about it not being in the water.
In the given instance, the ecological service which is providing the marsh is the water purification. Thus, the correct option will be D.
Ecological services or ecosystem services are the many and varied benefits which the humans are provided or get from the natural environment and the healthy ecosystems. Such ecosystems include, for example, the agroecosystems, forest ecosystem, grassland ecosystems, and also the aquatic ecosystems.
A group of researchers are monitoring the health of a salt marsh. They measure high levels of nutrients in the sediment but not in the water samples. In this instance, the ecological service which is providing marsh is the water purification.
Therefore, the correct option is D.
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Juan is making a chart to organize his notes about centipedes.
Which best completes the chart?
tear plants
dig
squirt liquid
inject poison
Answer:
inject poison
Explanation:
edge2021
Answer:
D
Explanation:
Hi there,
What are the three limiting factors involved in photosynthesis???
:D
Answer:
light intensity, carbon dioxide concentration and temperature.
hope it helps:D
mark me as brainliest plz
Answer: light intensity, carbon dioxide concentration and temperature.
Explanation:
Which of the following best illustrates the idea of Survival of the Fittest?
A.
The strongest ant in the colony always gets the most mates.
B.
The strongest cow always eats the most grass.
C.
A slower cheetah is able to obtain more food than others because it is able to catch the slower deer while the faster cheetah goes after the fastest deer.
D.
The largest mouse always wins even though it is more easily seen by predators.
Answer:
The correct answer is - Option A. The strongest ant in the colony always gets the most mates.
Explanation:
The survival of fittest is the idea that is developed from the theory of evolution proposed by Darwin in his book Origin of Species. This phrase is used to explain the mechanism of natural selection. According to natural selection which is a process the species that adapt the ecological changes in order to survive and reproduce themselves, carry the traits to the next generation.
The ant colony has different classes on the basis of their role and strength. The queen is most strong ant that can produce offspring by mating with most of the mates.
Why does water feel cool when it evaporates?
O Evaporation uses energy, and this heat energy is taken from the body.
O Evaporation gives up energy, and this heat energy is added to the body.
O Evaporation makes the air moist, which makes it feel cooler.
Answer:
i think its A
Evaporation uses energy, and this heat energy is taken from the body.
Answer:
Evaporation uses energy, and this heat energy is taken from the body.
Explanation:
Do you think atrazine should be used? Explain your reasoning
Atrazine is safe to use so far.
Standards could change if EPA rules atrazine is more hazardous to health than previously thought. Currently, EPA standards allow 3 parts per billion (ppb) or less of atrazine to be present in drinking water.
how is the sun a key component of the water cycle
Answer:
It warms the water on Earth's surface and causes it to change from a liquid water to a water vapor or gas.
I needd this now barinliest to first person
Which of the following statements about cell reproduction is true?
a.Mitosis is a form of sexual reproduction.
b.Meiosis is a form of asexual reproduction.
c.The cells produced by mitosis are genetically identical to parent cells.
d.The cells produced by meiosis are genetically identical to parent cells.
Answer:
d
Explanation:
When trrowing a ball why does the triceps muscle contract?
Answer:
The contraction of the triceps muscle causes the arm to flex. The contraction of the triceps muscle causes the arm to extend. When added to the force of the biceps contracting it provides extra force to the ball.
#5 Megan's lesson really mattered
The frequency of genes that lead to favorable traits increases because
A.
favorable traits always start out as the rare form and become more common
B.
the genes for favorable traits are dominant over those for unfavorable genes
C.
Both B and D
D.
those genes continue on to the next generation when the individuals that contain the genes successfully survive and reproduce
Answer:
The answeer is both B and D.
How do humans help plants during photosynthesis?
Answer:
Humans breathe out carbon dioxside which plants need to live and grow during the process of photosynthesis.
Explanation:
They do this by a process known as photosynthesis. ... Photosynthesis and respiration are the two essential processes that allow life to sustain on earth. In a way, they are a cycle — plants help humans breathe by providing us with oxygen, and humans help plants "breathe" by providing them with carbon dioxide.
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which event would most likely lead to a thunder storm
i think the answer is (C)
Explanation:
The warm air becomes cooler, which causes moisture, called water vapor, to form small water droplets - a process called condensation. ... If this happens with large amounts of air and moisture, a thunderstorm can form.
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Which phase of cell division is shown?
A) prophase I of meiosis
B) telophase II
C) anaphase II
D) telophase I
Answer:D
Explanation: Hope it helps
Gas makes things buoyant, why ? And what are ways that this could be useful?
Answer:
Gas makes things buoyant by making the volume of an object lighter than the surrounding fluid it is trying to displace.
Gas Buoyancy is useful in the following ways;
• Airships
• Steel ships and
• All floating and flying vessels
Explanation:
Buoyancy is the tendency of an object to float in a fluid such as air or water. It is a phenomenon that was theorized by the mathematician, Archimedes known as the Archimedes Principle.
It states that the upward buoyant force that is exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces.
The principle explains the reason why objects float and fly.
So, when an object is immersed in a fluid, it can float due to the upward force exerted by the fluid on the object. But for this to happen, the object has to weigh less than the fluid it is displacing.
This is where the use of a gas comes into play.
Because the object may be heavier than the surrounding fluid it is trying to displace, it is filled with a large amount of gas (usually hydrogen and/or helium) which is lighter. This makes the volume of the gas and the object put together lighter than that of the surrounding air.
This is what causes objects to float or fly
9. When water is ejected from the earth's interior in the form of hot water, it is called
A) Geyser
B) Hot Springs
C) Both (A) and (B)
D) None of the above
10. The efficiency of geothermal plant is about
A) 5%
B) 15%
C) 25%
D) 35%
When water is ejected from the earth's interior in the form of hot water, it is called a geyser and hot spring. The efficiency of a geothermal plant is about 15%.
Hot springs and geysersHot springs are defined as springs generated by the emergence of heat groundwater onto the Earth's surface.
A geyser is a specific type of spring that ejects heat water, which is accompanied by steam.
In general, these geological formations (geysers) are associated with volcanic areas.
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