Answer:
Agriculture
Explanation:
Anthropogenic activities are activities caused or influenced by humans. In ecological succession, changes can also be induced by human activities. One of the activities that can be engaged in by humans to provoke ecological succession is AGRICULTURE.
Performing certain agricultural practices can alter the composition and structure of a community, hence, resulting into ecological succession. Therefore, AGRICULTURE could be an anthropogenic factor that would influence ecological succession.
N.B: the other two occurrences are natural disasters.
how is penicillin used
Answer:
Con la mano,
Explanation:
Sos pelotudo o que?
Answer:
Penicillin stops bacteria from multiplying.
Which of the following regarding blood vessels is not true?
Group of answer choices
arteries have valves to jprevent backflow
Arteries have thick, elastic walls to accommodate the high pressure of blood pumped from the heart
In the thinner-walled veins, blood flows back to the heart mainly as a result of muscle action
Arteries and veins have an endothelium, smooth muscle, and connective tissue
Answer:
2
Explanation:
aritieries have thick,elastic walls to accommodate the high pressure of blood pumped from the heart
There are two strains of E. coli, let's call them
strain A and B. Both are his- mutants. A his-
mutant is unable to synthesize the amino acid
histidine. Both strains are unable to grow on
chemically defined media if the media is not
supplemented with histidine. Careful analysis of
strain A demonstrated that the mRNA for
histidine genes is transcribed but not translated.
No histidine mRNA was present in the cytosol of
strain B. How is this possible?
Answer:
Strain A is subject to posttranscriptional gene silencing, whereas Strain B is subject to transcriptional gene silencing
Explanation:
During transcription, a segment of DNA (e.g., a gene) is used as a template to synthesize a complementary RNA molecule, typically a messenger RNA (mRNA) molecule, which is in turn used as a template to synthesize a polypeptide chain (i.e., a protein) by a process known as translation. In consequence, gene expression involves two different processes (i.e., transcription and translation), by which genetic information contained in DNA flows from genes to proteins. Transcriptional silencing refers to the phenomena by which the transcription of one or more genes (in this case, the genes necessary for histidine biosynthesis) are repressed or not, dependent only on the gene's chromosomal location, whereas posttranscriptional silencing occurs when transcripts do not accumulate in spite of continuous mRNA transcription. In this case, mRNA synthesis is expected to occur in strain A his-mutants (i.e., strain A is subject to posttranscriptional gene silencing), whereas mRNA synthesis is not expected to occur in strain B his-mutants (i.e., strain B is subject to transcriptional gene silencing).
The movement of DNA or RNA in gel electrophoresis is often a matter of molecular weight alone. Which of the following molecular parameters usually influence the movement of protein?
a. weight, charge, or shape
b. only charge
c. only shape
d. only weight and shape
d. only weight
Answer:
a. weight, charge, or shape
Explanation:
Gel electrophoresis is a molecular technique used to separate samples of DNA, RNA and proteins on the basis of charge, mass or size. The molecules migrate through a gel matrix supplied with electric current on the basis of size or charge. For example, +ve charge molecules move towards the -ve end of the matrix or smaller molecules move faster.
According to this question, the movement of DNA or RNA in gel electrophoresis is often a matter of molecular weight (size) alone. However, that of protein involves a combination of weight, charge, or shape.
Select ALL statements that correctly describe a function of the Respiratory System, or describe a process of Respiration.
a. Moves air in and out of the body.
b. Warms and humidifies the air.
c. Regulates the cellular compositon of the blood.
d. Filters the air.
e. Exchanges gases with the blood.
f. Occurs in the Lung.
g. All of the above.
Answer:
should be G) all of the above
Explanation:
health class and quick double check to a reliable source
The correct option is, (g) All of the above.
What are the 4 main functions of the respiratory system?Enables you to speak and smell.Raises the temperature of the air to that of your body and adds moisture to it to the proper degree of humidity.Provides your body's cells with oxygen.When you exhale, waste gases from your body, including carbon dioxide, are removed.What describes the function of the respiratory system?We can breathe thanks to our respiratory system and lungs. They expel carbon dioxide and inspire oxygen into our bodies, a process known as inspiration or inhalation (called expiration, or exhalation). The process of breathing involves the exchange of oxygen and carbon dioxide.Which of the following performs the function of respiration?The network of organs in the human respiratory system is in charge of absorbing oxygen and exhaling carbon dioxide. The lungs, which perform this gas exchange as we breathe, are its main organs. All of the body's cells are supplied with oxygen-rich blood by the circulatory system and the lungs.Learn more about respiration here:
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Describe how human activities cause desertification including desertification’s impacts on soil and the role of modern agriculture in causing Desertification.
Answer:
Desertification is the destruction of the biological potential of the land and it is generally viewed as an advanced stage of land degradation. human activities also cause the process such as poor irrigation practices, deforestation, the expansion and intensive use of agricultural lands, and overgrazing.
Such human activities put enormous pressure on the land by altering its soil chemistry and hydrology. Modern agriculture causing a negative impact on the soil and land by overexploiting the biological and chemical potential of the land.
State the overall chemical reaction for respiration (a simple form of it, not all the steps.)
Answer:
Cellular respiration is the chemical reaction in which glucose and oxygen are turned into water, carbon dioxide, and energy (ATP).
Explanation:
Hope it works...
Plants as well as brown, green, and red algae show a basic life cycle which involves the alternation of generations between a(n) egg and a sperm. seed and a cone. spore and pollen. megaspore and a microspore. sporophyte and a gametophyte.
Answer:
The correct answer is ''sporophyte and a gametophyte''
Explanation:
Plants have a diplohaplon life cycle: a haploid adult plant, called a gametophyte, and a diploid adult plant, called a sporophyte. In green algae, the two generations, sporophyte and gametophyte, are independent and generally the same size. This type of life cycle is found not only in many multicellular green algae, but also in brown algae and red algae. In vascular seedless plants, including ferns, gametophytes, although still independent, are smaller in size than sporophytes. In seed plants, the gametophytic generation is further reduced and is totally dependent on the sporophyte.
Explain and quantify the ATP produced at each step of cellular respiration.
Answer:
atp is generally taken by sports person .it starts multiplying the production of oxygen in muscle so they do not tired easily and last long.
7. What is transformation and describe how it has been done in a famous
experiment.
The shift in molecular biology is the genetic change of the cell resulting from the direct absorption and integration of the dna material rebusied external oxygen from its surroundings and its intake through the cell membrane. Transformation occurs naturally in some types of bacteria, but artificial means can also be affected in other cells
Hope it helps
14. If you punish a dog for some behavior, then immediately reward the dog when
the behavior stops, you're
A. establishing the punishment as a secondary reinforcer.
O B. getting rid of the behavior effectively.
O C. not having any effect.
D. taking the long way around.
Answer:A
Explanation:
Which technique could be used to evaluate the primary amino acid sequence of a protein?
Answer:
Hundreds of proteins have been sequenced by Edman degradation of peptides derived from specific cleavages. Protein Mass Spectrometry is an analytical technique that measures the mass-to-charge ratio of charged particles for determining masses of particles and the elemental composition of a sample of molecules as well as for elucidating the chemical structure of molecules such as peptides. Protein mass spectrometry is an important method for the accurate mass determination and characterization of proteins, and a variety of methods and instrumentations have been developed for its many uses.
Question 6 of 10
An independent variable is a factor in an experiment that:
A. is manipulated by the scientist.
B. is deliberately kept the same.
C. responds to the test variable.
D. fails to affect the observations.
Answer:is A.is manipulated by the scientist.
Explanation:
In which layer of the ocean are you likely to find most planets
Answer:
The epipelagic zone
Explanation:
It extends from surface of ocean to 200 meters deep from surface. This is where sunlight enters the ocean.
Answer:
The epipelagic zone
Explanation:
Because it extends from the surface of the ocean to 200 meters deep from the surface.
When a muscle is stimulated repeatedly at a high rate, eliminating a relaxation phase, the amount of tension gradually increases to a steady maximum tension. This is called:_______
Complete tetanus occurs when the muscle is stimulated repeatedly at a high rate, eliminating a relaxation phase, the amount of tension gradually increases to a steady maximum tension.
What is Complete tetanus?A tetanic contraction is also called as tetanized state, tetanus, or the physiologic tetanus, the latter is used to differentiate from the disease called tetanus, which is a sustained muscle contraction that is evoked when the motor nerve which innervates a skeletal muscle emits action potentials at a very high rate than usual action potential production rate.
Complete tetanus is also called fused tetanus. It occurs when the frequency of stimuli increases still further than normal. In this case, the individual muscle contractions completely fuse to produce one large enough muscle contraction in the body.
Learn more about Tetanus here:
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gene has a base sequence that starts with: TAG CAT GGC AT.
A) The gene has a point mutation and is changed to the sequence below : TAG CTT GGC AT. What kind of mutation is this?
B) What is the new mRNA strand formed by this gene?
C) What are the new amino acids formed from this gene?
D) Describe how the mutation has affected the protein coded by this gene.
Answer:
A. Substitution mutation
B. AUC GAA CCG UA
C. Isoleucine- Glutamic acid- Proline
D. It will lead to formation of a different protein
Explanation:
According to this question, the gene has a base sequence that starts with: TAG CAT GGC AT but undergoes a kind of point mutation to become; TAG CTT GGC AT.
A. From the observation of the two base sequences, base A is substituted for base T in the second Codon i.e. CAT to CTT. This is an example of SUBSTITUTION MUTATION because it involves the replacement of a base nucleotide by another.
B. Following transcription, which is the synthesis of mRNA from a DNA template, the mRNA sequence from the mutated sequence is as follows: AUC GAA CCG UA
C. Following translation using the genetic code, the amino acid sequence that will result from the mutated sequence is as follows: Isoleucine- Glutamic acid- Proline
D. Due to the change in nucleotide base of a codon, a change in the amino acid sequence has occured. Hence, this will lead to the formation of a different protein.
Chemical digestion involves condensation reactions.
O True
O False
False
Although I am answering based on my recollection, I am sorry if I am wrong.
Which is true for both photosynthises and cellular respiration
Umm.. Hi there! Can someone please help me out with this? (only for those who know the answer)
Bcoz I really need this rn :(
DUEEEE AFTERRR LUNCHH! :(:(:(:(
If your answer is NONSENSE it will be deleted as soon as possible!
But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!
Answer:
The name of the element is Potassium.
it's got 19 electrons in total and 1 valence electron.
electrons are arranged in the respective orbitals as (2, 8, 8, 1). from lowest to highest ~ {s, p, d, f}
no. of electrons in s orbital = 2 no. of electrons in p orbital = 8no. of electrons in d orbital = 8no. of electrons in f orbital = 1symbol of the element is K.
Dia prepared potato chips that tasted yummy. She washed the potatoes after she cut them in small pieces and then fried them in excess oil with lots of spices to make it crunchy and tasty. Was her method of cooking correct? Justify your answer.
Answer:
it is her wish to cook however she wants
give women freedom
we deserve it
What is not necessary for diffusion?
A. water
B. molecules
C. energy
Select the group of body systems responsible for energy supply and fluid balance.
a. Endocrine, Nervous
b. Urinary, Muscular, Reproductive
c. Integumentary, Skeletal, Muscular
d. Urinary, Digestive, Respiratory
Select the group of body systems responsible for energy supply and fluid balance.
d. Urinary, Digestive, Respiratory
1m/s2 acceleration on body of mass of 1 kg is producd called...?
1 m/s^2 acceleration on body of mass of 1 kg is simply called 1 neuton
I need help on this question please someone?
Answer:
I believe its neuromuscular synapse
Explanation:
Answer:
Neuromuscular Junction
Explanation:
A neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber. It allows the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction.
What is the answer with explaining
Answer:
Man (dimples and freckles) - FfDd
Woman (no dimples and no freckles) - ffdd
Child (no dimples and no freckles) - ffdd
Explanation:
According to this question, the possession of freckles (F) and dimples (D) are the dominant traits. The union of a man with dimples and freckles and a woman with no dimples and freckles (ffdd) gave rise to a child that has no dimples or freckles (ffdd).
Since the child has a recessive 'ffdd' genotype, it means that the father will likely have a heterozygous genotype (FfDd). Therefore, the genotypes of the three persons involved are;
- Man (dimples and freckles) - FfDd
- Woman (no dimples and no freckles) - ffdd
- Child (no dimples and no freckles) - ffdd
hey please help ?????
Answer: true.
Explanation:
3. What substances transported in blood does the liver excrete as bile?
A. Gases
B. Hormones
C. Nutrients
Explanation:
All substances excreted from the liver are for digestion. This breaks down protein that we eat.
I believe the answer is c, because this is the last stop for digesting proteins..
after that, it gets recycled again.
thru this, the liver excretes the by products by turning into fecal matter and urine..
__describes non-seasonal changed in the structure or composition of an ecological community over time
Ecological succession
Community ecology
Ecosystem dynamics
Answer:
Ecological succession
Explanation:
In ecology, ecological succession is described as a series of change in the structure or composition of an ecological community over a period of time. There are two types of ecological succession namely: primary succession and secondary succession.
Primary succession occurs on a barren land with no prior growth while secondary succession occurs in an area that has been colonized before but disturbed by an environmental hazard.
Mass of the moon is 7.4x10^22 kg and its radius is 1740km, Calculate the value of acceleration due to gravity on the surface of the moon. *
Answer:
The gravitational acceleration in the surface of the moon is 1.63 m/s^2
Explanation:
The gravitational acceleration at a distance R of an object of mass M, is given by:
g = G*M/R^2
Where:
G is the gravitational constant.
G = 6.67*10^(-11) m^3/(kg*s^2)
We could think that all the mass of the moon is at its center, then at the surface of the moon, the distance will be equal to the radius of the moon, thus:
R = 1740km
But we want to work with meters, so remember that:
1km = 1000m
then:
1740km = (1740)*1000m = 1740000m
R = 1740000m
And the mass is just:
M = 7.4x10^22 kg
If we input all that in the gravitational acceleration equation, we get:
g = (6.67*10^(-11) m^3/(kg*s^2))*(7.4x10^22 kg)/( 1740000m)^2
g = 1.63 m/s^2
The gravitational acceleration in the surface of the moon is 1.63 m/s^2
give two adaptations that help leopard seals to feed?
Explanation:
the presence of the for smelling preys
the presence of the eye for sighting preys
