The sympathetic nervous system releases hormones known as catecholamines which increase the heart rate.
What is a heart rate?it is the number of contractions of the heart per minute.
What are catecholamines?These are the neurotransmitters that have a catechol and a side chain that is an amine.
Which catecholamines are released by the sympathetic nervous system?Epinephrine and norepinephrine are the catecholamines that are released by the sympathetic nervous system to increase the heart rate.
Where are these hormones released?These hormones are released in the blood.
How does this hormone increase the heart rate?"These hormones are released at the neuromuscular junction of the cardiac nerves.""They shorten the repolarization period."This speeds up the rate of depolarization and contraction and thus the heart rate is increased.To learn more about sympathetic nervous system, hormones and heart rate here,
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Which disorders can be caused by inbreeding?
a) albinism—a genetic disorder that causes the absence of skin pigment
b) bone fracture—an injury to the bones from a fall or an accident
c) flu—a disease caused by a virus
d) hemophilia—a genetic disorder that prevents blood from clotting
e) vertigo—a sensation of things spinning
Answer:
A and D
Explanation:
they both require a recessive gene and if we have people who are related mating, then it's more likely that those two will occur also they are the only options that can be genetic disorders
Answer:
haempholia..... as inbreeding is also related to genetic...
Explanation:
the nutritive value of sunflower seeds a brief note
100 grams of these seeds give around 585 calories of energy.
They have a good amount of fibre (8.5 g) and fats (51.5 g). Fats present are mostly polyunsaturated and monounsaturated; which are good fats
They are also rich in protein (20.77 g).
Read the article to learn more about the disorders that can occur when there is an irregular number of chromosomes. human chromosomal disorders explain how nondisjunction can lead to aneuploidies.
The formation of the zygote with an abnormal number of the chromosomes is called aneuploidy.
What are the chromosomes?We know that the process of reproduction in organisms would involve the passage of the hereditary facts that can be found in the organisms that are under study. This was the focus of the laws that were put forward by Gregor Mendel. He did say that the factors that do control the inhertiance of the organisms are what we call the genes today.
Let us note that the genes that can be found in the organims as we know them are contained in the chromosomes. The chromosomes are also able to be divided as the cell is being divided. In the stages of the cell division, the process by which the chromosomes are separated is called the disjunction.
There are cases where the chromosomes do not separate and this is what we call the nondisjunction of the chromosomes.
Since the chromosomes do not separate accordingly due to nondisjunction, there would be an unusual number of chromosomes and this is called aneuploidy.
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Help due today!!!!
in which situation would alley cropping be most useful for sustainable farming?
growing crops that require a lot of shade
growing crops that need the same nutrients from the soil
growing crops in an area with little rainfall
growing crops on a mountainside
Answer:
A
Explanation:
growing crops that require a lot of shade
Just did the final
Where crops need a lot of shade to flourish, alley farming works best.
What do you mean by farming?The raising of animals for human consumption and the cultivation of crops are both referred to as farming. In order to maintain environmental conservation, sustainable farming practices must be adopted.
Crop plants are grown amid rows of trees in a practice known as "ally farming." Where crops need a lot of shade to flourish, alley farming works best.
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What does Hardy-Weinberg equilibrium
illustrate about populations?
A. Any population can remain the same and not evolve.
B. All populations cannot evolve as the conditions are
impossible to meet.
C. All populations evolve because the conditions cannot all
be met.
The Hardy-Weinberg equilibrium illustrates that 'all populations evolve because the conditions cannot all be met' (Option C).
What is the Hardy-Weinberg equilibrium?The Hardy-Weinberg equilibrium is a model used in population genetics to estimate genotypic and allelic frequencies in a population.
This model (HW equilibrium) states that genotypic frequencies remain as constant values in absence of evolutionary constraints.
In conclusion, the Hardy-Weinberg equilibrium illustrates that 'all populations evolve because the conditions cannot all be met' (Option C)..
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in a particular variety of corn, kernel corn is controlled by a single gene with two alleles. the dominant allele results in purple kernels, and the recessive allele results in yellow kernels. a single corncob may contain
hundreds of individual kernels, each of which is the result of a separate fertilization event. what would the frequency of yellow kernels be that result from a cross between two heterozygous plants?
25%
0%
75%
50%
The frequency of recessive yellow beans resulting from a cross between two heterozygous plants is 25%.
What are recessive alleles?Recessive alleles differ from dominant alleles in not being able to express themselves in heterozygotes. These alleles are only expressed in the phenotype if they are present in pairs, that is, they must be in homozygosity.
With this information, we can conclude that the frequency of recessive yellow beans resulting from a cross between two heterozygous plants is 25%.
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1. Can a single organism change its traits to become better suited for its environment during its lifetime? (highlight one) YES or NO
Answer:
check explanation
Explanation:
If you are talking about adapting to an environment then yes, like how we train to strengthen our muscles to get stronger. If you mean by evolving then no, a single organism can not evolve their traits in a lifetime, like a human can't naturally grow gills to breathe underwater
An autotroph is an organism which makes its own food. True or false
Answer:
yes
Explanation:
it can use light and water and carbon dioxide it's a producer.
the form of energy that refers to the motion of particles______ A. thermal energy B. heat C. temperature
Answer:
A. I think so it's correct
The first three strata of the epidermis consists of ______ keratinocytes and the most superficial strata contain ______ keratinocytes.
The first three strata of the epidermis consists of living keratinocytes and the most superficial strata contain dead keratinocytes.
What is the role of the keratinocytes?Keratinocytes are the most common cell type in the epidermis, the outermost layer of the skin, accounting for over 90% of all cells. They begin in the epidermis's deepest layer, the stratum basale, and progress to the skin's last barrier layer, the stratum corneum.
The stratum basale (germinatum) is the innermost (deepest) layer of the epidermis, followed by the stratum spinosum, stratum granulosum, stratum lucidum (when present), and the stratum corneum, which is the outermost layer.
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bio
which of the following is a density-dependent limiting factor
pls help!
whats the answer?
Answer:
Density-dependent factors include disease, competition, and predation.
Explanation:
For most anchoring situations, which is the best type of anchor line?.
Nylon Three-Strand line is the most commonly used anchoring line. The correct option is A.
What is anchor line?Anchor rodes can be all rope, all chain or a combination of both. The term “anchor line” as used here refers to the nylon portion of the rode.
Anchor rodes generally consist of a long length of nylon line with an eye splice and a thimble to which is shackled a short length of galvanized chain.
The missing options are:
Nylon.Dyneema.Polyethylene.Nylon Three-Strand line is the most commonly used anchoring line.
Thus, the correct option is A.
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Which material is a part of bedrock?
silt
plants
wood
water
Answer:
A. Silt
Explanation:
I got it right
Silt is a part of bedrock.
What is a bedrock?The bedrock is the solid, hard rock that lies beneath the dirt and gravel of the surface. The majority of rock types, including granite, limestone, and sandstone, can be used to create bedrock. Bedrock can be found hundreds of meters below the Earth's surface, near the planet's crustal base.All areas of the Earth's surface are supported by bedrock, also known as ledge. The majority of the time, it is covered by flora and soil, but in areas like mountain tops, stream banks, and road cuts, it is frequently exposed at the ground's surface. Rockhead refers to a bedrock's top limit. Saprolite may be present over bedrock above the rockhead. Bedrock that has undergone severe weathering, or wearing away, is called saprolite.
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Normally, humans think of wildfires as
a negative thing. In which biome can
fire suppression have a considerable
impact?
A. desert
B. tropical rainforest
C. tundra
D. grassland
Answer:
D. grassland
Explanation:
Wildfires in grasslands can allow nutrients to return to the soil and allow plants to regrow.
Putting the gene for bioluminescence in fish an an example of
Scientists have isolated the gene that produces the bioluminescence protein and inserted the gene into the embryos of tetra fish. This results in tetra fish that produce a green glow.
How, support your answer?Tetra fish is a type or an example Glofish that has undergone genetic modifications whereby the gene in jelly fish that produces the green fluorescent protein (GFP) was extracted and inserted into the embryos of the tetra fish thereby causing them to glow or fluoresce in the presence of Ultraviolet light or natural light.
The genetically modified tetra fish passes this fluorescent gene from one generation to another.
Thus, The aim of this genetic modification in tetra fish was to be able to detect water pollution in the sea using the glow of the tetra fish.
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Use the following information to calculate the correct frequencies: In a population of
Pennsylvanians, only 18% of individuals express the recessive trait of Syndactyly or webbed finger
(formulas: p+q=1 and p²+2pq+q2²=1)
a. What percentage of the population are not Webbed?
If we have the recessive genotypic frequency, we can calculate the phenotypic frequencies in a population in Hardy-Weinberg equilibrium. The percentage is 82%.
What si the Hardy-Weinberg equilibrium theory?The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies remain the same through generations in a population that is in equilibrium.
The allelic frequencies in a locus are represented as p and q. Assuming a diallelic gene,
Allelic frequencies
The frequency of the dominant allele f(X) is pThe frequency of the recessive allele f(x) is qGenotypic frequencies after one generation are
• p² ⇒ H0m0zyg0us dominant genotypic frequency,
• 2pq ⇒ Heter0zyg0us genotypic frequency,
• q² ⇒ H0m0zyg0us recessive genotypic frequency.
The addition of the allelic frequencies equals 1
p + q = 1.
The sum of genotypic frequencies equals 1
p² + 2pq + q² = 1
Available data:
18% of individuals express the recessive trait of Syndactyly
Let us say that the dominant allele is A and the recessive allele is a.
The dominant allele A codes for normal finger.The recessive allele a codes for webbed finger.Assuming this gene expresses complete dominance,
H0m0zyg0us dominant and heter0zyg0us -AA and Aa- individuals have normal finger.Their frequency in the population is p² + 2pq.
h0m0zyg0us recessive -aa- individuals have webbed finger.Their frequency in the population is q².
Individuals that express Syndactyly have webbed finger and their genotype is h0m0zyg0us recessive, aa. Their frequency in the population is q².
q² = 18% = 0.18
We can get the frequency of individuals with normal fingers by clearing the following equation,
p² + 2pq + q² = 1
p² + 2pq + 0.18 = 1
p² + 2pq = 1 - 0.18
p² + 2pq = 0.82
The frequency of individuals with normal fingers is p² + 2pq = 0.82 = 82%.
The percentage of the population are not Webbed is 82%.
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A point mutation changes a codon in an mrna molecule. Will the mutation affect the polypeptide that forms? why?.
Answer:
maybe
Explanation:
because some sets of codons are translated into the same amino acid
A molecule of mRNA with the sequence GGUCAUCACUAU experienced a
point mutation that caused the sequence to become GGCCAUCACUAU.
Which of the following terms describes this type of mutation?
Amino acids
Glycine Histidine
Tyrosine
Codons
GGU
CAU
UAU
GGC
CAC
UAC
GGA
GGG
O A. Frameshift mutation
OB. Silent mutation
C. Nonsense mutation
D. Missense mutation
The term that describes the type of mutation is silent mutation, which is option B. Details about silent mutation can be found below.
What is mutation?Mutation is any change in the nucleotide sequence of DNA molecule.
Mutation can be of different types as follows:
Frameshift mutationSilent mutationNonsense mutationMissense mutationSilent mutation is the type of mutation that does not change the resulting amino acid.
According to this question, codon GGU is changed to GGC but they encode the same amino acid (glycine), hence, it is a type of silent mutation.
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Answer:
a
Explanation:
it’s right
A parent of a child in a crowded daycare is worried about the staff passing on a bacterial infection to the child. Which infection would be most likely
Answer: Impetigo
Explanation: done this before
What of the following will occur after a fire burns down 100 acres of a forest?
Question 2 options:
The forest cannot recover without human intervention
Primary Succession
Secondary Succession
Adaptive Radiation
Secondary Succession will occur after a fire burns down 100 acres of a forest. thus option C is correct.
What is secondary succession?When a disturbance does not completely remove all life and nutrients from the environment, secondary succession occurs.
Despite the fact that fire, flooding, and other disturbances can devastate a landscape, drive away many plants and animals, and reset the biological community to an earlier stage, the habitat remains alive because the soil stores nutrients and seeds that were laid down before to the disturbance.
Buried seeds can sprout soon after the disruption has passed, and some may have a better chance because of less competition and less shading. Some animals may have evolved to deal with a particular disturbance on a regular basis.
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if a gene is located in the Y chromosome could the trait ever be expressed in a female?
How does pancreatic juice get into the alimentary canal in the frog.
This juice includes several digestive enzymes. Since the pancreas lacks a self-dependent duct, the pancreatic juice advances the duodenum via the hepatopancreatic duct.a
is recessive (e), and the allele for detached earlobes is dominant (E). What
must be true if a boy is born with attached earlobes?
A. He has no recessive alleles.
Jo has a heterozygous genotype
1. Which plant tissue provides both mechanical strength as well as flexibility?
2. what chemical substance is deposited in the secondary wall of sclerenchyma?
3. What is crenation?
4. which structure is also called "Little nucleus"?
Answer:
1 collenchyma provides both mechanical strength as well as flexibility
Answer:
1)Collenchyma provides both mechanical strength as well
as flexibility.
2)Lignin is the chemical substance deposited in the wall of
sclerenchyma.
3) crenation describes an object's shape, especially a leaf or
describes an object's shape, especially a leaf orshell, as being round-toothed or having a scalloped edge
4)Nucleolus
Why is it a good idea to study experimental subjects in their natural environment? OA. So that a specific problem can be solved as quickly as possible OB. So that the experiment is cheaper and easier to conduct C. So that they respond to the test as they would under normal conditions O D. So that no one else will know what is being studied
Are there any limits on what you can change? for example, it
would not be realistic to remove all of the farms. is there
anything that people cannot compromise on?
types
what else would you need to know to come up with a plan of
action? where could you get that information?
t over
for
nd they
5. and
I believe that there any limits on what a person can change because some things are beyond our control and no matter what you do, it cannot change the fact.
Is there anything that people cannot compromise on?There are a lot of things that that people cannot compromise on. They include:
One's Friends and Family. One's Hobbies and Passions. Your Culture and Goals. Self-Love.Therefore, I believe that there any limits on what a person can change because some things are beyond our control and no matter what you do, it cannot change the fact.
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Which training zone is considered the healthy heart zone for improving health related issues like high blood pressure and cholesterol?.
The zone which is considered the healthy heart zone for improving health related issues like high blood pressure and cholesterol is 50 - 60%.
What is high blood pressure?The condition known as high blood pressure often makes the heart to pump blood at a greater pressure than is necessary. This may be caused by blockade of the blood vessels by cholesterol.
Thus, the zone which is considered the healthy heart zone for improving health related issues like high blood pressure and cholesterol is 50 - 60%.
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The introduction of caulerpa, also known as killer algae, into california was ultimately the result of _______. a. hull fouling b. the aquarium trade in exotic, nonnative aquatic species c. intentional release d. an algae farming company please select the best answer from the choices provided a b c d
Answer:
A
Explanation:
Organisms will attach themselves to ships on long trips to travel long distances especially aquatic plants
A green plant is a type of producer,
also known as a (n).
A. autotroph
B. heterotroph
C. chemotrophy
Copyright ©2003-2002 International Academy of Science. All Rights Reserved
5
Option A) Autotroph
Explanation:
Autotrophs - which can obtain their food from inorganic sources in the form of Carbondioxide and water , e.g green pkants and some bacteria. They use simple food material while heterotrophs utilitie complex substances for obtaining energy.1pt Recessive traits are less common in a population than dominant traits.
O A. false
OB. true
Answer:
True
Explanation:
Usually, dominant traits will show more often because they are, well, dominant. For example, BB and Bb would both show up with dominant traits. It would be required for all lowercase bs in order for a recessive trait to be seen.