Answer:
DNA structure
DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.
Explanation:
anyone know these please help me out i need a lot of help
Answer:
1. False
2. True
3. True
4. True
Explanation:
1. Not all mutations are bad! Some actually can provide people with advantages.
2. Back to number 1, yes! Some mutations can give you advantages that people would not normally have.
3. Yes! Melanin helps protect our skin from damage from UV rays from the sun. This is why people with lighter skin tend to “tan” or “burn”.
4. Yes! Mutations are often a random process. We cannot determine whether or not someone will be born with or without a mutation.
Which of the following plant propagation methods requires sterile conditions?
• hybridization
• clone by layering
• root division
• tissue culture
A nucleotide is made of three parts. They are: __?__, __?__, and __?__.
Answer:
Sugar, phosphate group, and a nitrogenous base.
Explanation:
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In the past, pacific sea otters were hunted to near extinction.
Without the otters, kelp forests along the coast started to die
because sea urchins, the otter's favourite food, were able to
overgraze them. Once otters became protected, the kelp
forests began to recover as the urchins were back in check.
In this kelp forest ecosystem, sea otters are a ________
species.
Enter the answer
Check it
Answer:
Keystone
Explanation: keystone
This tree is dying in the dry environment. What ABIOTIC limiting factor is affect the tree? please help
Please help me with this question
PLS HELP!!
In a normal distribution, the number of organisms exhibiting a phenotype variant near the lowest value is(1 point)
-greater than the number exhibiting a variant near the highest value.
-greater than the number exhibiting a variant near the middle value.
-less than the number exhibiting a variant near the middle value.
-less than the number exhibiting a variant near the highest value.
Kamar is looking for his birth mother. Kamar knows that his blood type is AB and his father’s blood type is heterozygous A. What can Kamar assume about his mother’s blood type?(1 point)
-Kamar’s mother must be either AB or B because blood types AB is considered codominant.
-Kamar’s mother must be AB because blood type AB is inherited from one parent.
-Kamar’s mother must be O because the recessive allele allows for Kamar to get type A from his father.
-Kamar’s mother must be either A or O because blood type AB is considered incomplete dominant.
A statistician collects height data in inches for a school district. Which sample is most likely to produce a normal distribution?(1 point)
-Grade 10-12
Height Range 55 - 60 60 - 65 65 - 70 70 - 75
Frequency 4 9 8 4
-Grades 1-3
Height Range 30 - 35 35 - 40 40 - 45 45 - 50
Frequency 4 1 10 10
-Grades 7-9
Height Range 50 - 55 55 - 60 60 - 65 65 - 70
Frequency 11 5 6 3
-Grade 4-6
Height Range 45 - 50 50 - 55 55 - 60 60 - 65
Frequency 12 8 4 1
The different variants of a trait available to a gene are called(1 point)
-alleles.
-genotypes.
-polygenic traits.
-phenotypes.
A wolf populations’ undercoat thickness follows a normal distribution. Suppose climate change causes the winters to grow colder. Over many generations, the distribution of undercoat thickness in this population will likely(1 point)
-shift toward a thinner coat.
-shift toward a thicker coat.
-remain the same.
-no longer be normal.
HELPPPP PLEASE....
:)
1 is a: less than...middle value
2 is c: ab or b
3 is d: grade 10-12
4 is a: alleles
5 is a: ..... thicker coat
Explanation: just took this, these are the correct answers for MY quick check. could very well be different for yours. hope this helps though :)
The wolves undercoat will grow towards been thicker in order to protect the wolves from extreme cold conditions posed by the winter and this phenomena is called adaptation.
Blood types of offspring's are determined by the blood groups of both parents therefore if Kamara has a blood type AB his mother will mostly likely have either AB or B blood type.
Alleles are the different variants of a gene in living organisms but they are located at the same position on the chromosome.
Hence we can conclude that answers to the questions are as listed above.
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What is the best description of the chromosomes by the end of metaphase of mitosis?
The chromosomes reach opposite sides of the cell and begin to be incorporated into two new nuclei.
The chromosome pairs collect in a line across the middle of the cell.
The chromosomes separate at the centromere and begin to move apart.
The chromosomes have coiled and become more compact.
Answer:
The chromosome pairs collect in a line across the middle of the cell.
Explaination: i have a whole slide show i had to make for science i looked at that
guys help with this plzz
brainlest even if u try ur best :
Vasoconstriction and Vasodilation
__________ carries heat from the core around the body.
As blood flows through the ______________ close to the surface of the ______, heat is lost to the body’s surroundings.
The __________________ which supply the capillaries in the skin have smooth _________ in their walls. This means that the arterioles can dilate or constrict to ____________ the flow of blood into the capillaries.
Explanation:
is it only vasoconstriction and vasodilation as the answers or are there more?
why is the late Cambrian thought of as the period of the greatest evolutionary change in life forms on earth's history?
Answer:
The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion," because of the relatively short time over which this diversity of forms appears.
Crude oil escaped from the well at an average rate of barrels per day. Calculate how many barrels of 60,000 crude oil flowed from the well from May 1 to May 31, 2010.
Answer:
1,800,000 barrels
Explanation:
60,000 barrels x 30 days
The speed of an object at a particular moment in time is known as the........
A. instantaneous speed
B. instantaneous velocity
C. Speed
D. Velocity
Answer: It would be A. Instananeous speed
Explanation: It is measured in metres per second
Animal that live in water is also called as _____?
Answer:
aquatic animals......hope it will help you
Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?
Carbon cycle controls the amount of carbon dioxide in the atmosphere. These processes are contributory to the carbon cycle in the environment.
What is a carbon cycle ?
The carbon cycle is nature's method of recycling carbon atoms, which repeatedly go from the atmosphere into Earth's living things and back into it. The majority of carbon is preserved in rocks and sediments; the remainder is preserved in the ocean, the atmosphere, and living things.
Life on Earth is reliant on the carbon cycle. The quantity of carbon that is naturally released from reservoirs is equal to the amount that is naturally absorbed by reservoirs because nature tends to maintain carbon levels in balance. This carbon balance must be preserved for the earth to continue to support life.
Therefore, the carbon cycle is an important chemical cycle.
Learn more about carbon cycle, here:
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What are disadvantages of the "Aoudad"?
PLEASE ANSWER ASAP!!
Answer:
Anecdotal reports suggest aoudad out compete native big game species for food, water, and cover as well as act as a disease reservoir on Texas landscapes. If significant overlap for resources and space are occurring among aoudad, desert bighorn and mule deer, aoudad could outcompete and outgrow native populations.
Explanation:
If the organisms were put in a dichotomous key for dassification, what would makethe organisms in the diagram different
from organisms that fall under the taxonomic group Bacteria?
A The organisms in the diagram are autotrophs.
B. The organisms in the diagram are unicellular.
C The organisms in the diagram are mobile and move with flagella,
OD The organisms in the diagram contain membrane-bound organelles,
Type here to search
Answer:
98.9% sure it's B. as far as I know
Doctors often use certain medications to treat infections. A few people have a reaction to some of these medications, such as itching, swelling, or trouble breathing. This is an example of
Answer: The body’s immune system overreacting to a usually harmless substance.
A reaction to some medications, such as itching, swelling, or trouble breathing is an example of hypersensitive reaction (drug allergy).
What is drug allergy?It a an allergic reaction of the body towards a medicine.
What kind of reaction is a drug allergy?It is a kind of hypersensitive reaction.
What is a hypersensitive reaction?It is an exaggerated response of a body towards an immunogen.
Why is it caused?When drugs bind to some immune cells such as T cells, they cause a release of some chemicals which causes an allergic reaction in the body.
To learn more about drug allergy and hypersensitive reaction here,
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SCIENCE ASSAP
what does primary succession mean
What is the function of erythrocytes?
What is the term for all the components of the blood?
What is blood?
Answer:
1. The main physiological role of red blood cells (RBCs), or erythrocytes is to transport of gases (O2, CO2) from the lung to the tissues and to maintain systemic acid/base equilibria. In addition, RBCs are well equipped with antioxidant systems, which essentially contribute to their function and integrity.
2. In humans, it includes plasma (the liquid portion), blood cells (which come in both red and white varieties), and cell fragments called platelets. Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in.
3.Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
hope it will help uWhat color would the bby and water turn with plants in the dark
Answer:
The water is drawn in the xylem through capillary action and is dispersed through out the entire plant from stem to tips of the leaves and petals. When the water is colored, the color from the water can stain the plant, especially if it is a light colored plant, such as the white petals on our flowers.
Explanation:
Photosynthesis requires light, water, carbon dioxide, and
____.
help pls!
“How might an energy requirement affect an individual who has a cancerous tumour?”
Answer:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function. Energy is stored in the bonds of glucose (like a stretched rubber band), and when glucose is broken down, much of that energy is released. Some of it is captured in a form that can be used to do work in cells - a molecule called adenosine triphosphate or ATP. The energy that is not captured in ATP is usually given off as heat (one of the things that helps us maintain our normal body temperature).
Which of the following is evidence of Continental Drift?
Shape of the continents
Distribution of fossils
Distribution of geological features
All of these
None of these
Answer:
All of these
Explanation:
If you put all of the continents together, they fit like a puzzle. If you look at mountains and match these when they are put together, mountains will be in similar places. The fossils found in Antarctica were fossils from warm climates. That could only be if all continents used to be one!
Please help if you answer correctly i will give brainliest
Answer:
1) Chicken: Codominance
2) Zebra: Independent assortment
3) Flowers: Incomplete dominance
4) Dalmatian: Law of segregation
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
How does movement along faults change the Earth’s surface?
Earthquakes are the result of sudden movement
along faults within the earth that releases stored
up elastic strain energy in the form of seismic
waves that propagate through the earth and
cause the ground surface to shake..
Please mark as brainlist
How is the phytoplankton affected by the changes we see in the global carbon cycle, write the claim, evidence, reasoning.
Bobcats are generally solitary and establish territories of a certain size where they hunt for food. What type of population dispersion would you expect bobcats to have?
Answer:
Uniform dispersion.
Explanation:
The bobcats' population distribution would be a uniform dispersion because they are distributed in an area in a balanced way. That is to say, that there is space between them and that each bobcat establishes its personal space when hunting and for their daily life. As they are solitary animals, they do not live in groups and only associate with other bobcats to reproduce themselves.
A human cell that has 46 chromosomes would have __ daughter cells that each have __ chromosomes after mitosis.
Answer:
2 daughter cells, 46 chromosomes
Explanation:
Mitosis is reproduction of somatic cells, or body cells. It's end product will always be 2 daughter cells, each identical to one another, therefore meaning, it will also have the same number of chromosomes!
Answer: one daughter cells and each have 23
Explanation: mitosis is the first then meiosis
Bacteria that generate reactions such as swelling of tissues, and fever in humans are an example of microorganisms that -
A.form mutualistic relationships with cells of other organisms.
B.break down the organic matter of dead plants and animals.
C.are pathogenic and are able to cause disease by killing host cells.
D.live in close association and provide resources for all plants and animals.
Answer:
B. Break down the organic matter of dead plants and animal
Which structure does the immune system target in type 1 diabetes?
a. beta cells of the pancreas
b. liver cells that release glucose
c. insulin receptors on fat cells
d. red blood cells in the bloodstream
Answer:
The thymus plays an important role in deletion of potentially autoreactive T cells. However, the presence of islet-specific T cells in the circulation of type 1 diabetes patients and healthy subjects indicates that the thymus is not capable of efficiently deleting all autoreactive T cells (Mathis and Benoist 2009).
Explanation:
Answer:
A: beta cells of the pancreas
Explanation:
Type 1 diabetes makes the pancreas produce little to no insulin.