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
A body of fresh water is shown below.
Which point in this body of water is most likely to have no plants growing?
A. Point C
B. Point D
C. Point A
D. Point B
Answer:
B. Point D
Explanation:
I just took the quiz
In the given image, on point D, it is not possible to have any plant. The correct option is B.
What are the requirements of plants to grow?To grow plants require enough sunlight, carbon dioxide and water. By using all these, plant perform photosynthesis by which it can survive.
As point D in the given image has no light sources, as sunlight cannot penetrate deep into the water, it is impossible to have growing plants here.
Thus, the correct option is B.
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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.
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:
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.
1. What are the three "common characteristics” of model organisms?
Answer:
they need food for survival
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
What is the difference between cellular respiration and gaseous exchange
Answer:
Gas exchange is the intake of oxygen and the excretion of carbon dioxide at the lung surface. Oxygen moves into the blood and carbon dioxide moves out of the blood. Cell respiration is the process that releases energy from the food
The video compares the key similarities and differences between mitosis and meiosis. Determine which events occur in mitosis, meiosis, or in both mitosis and meiosis. Write each event to the appropriate category. a. Chromosomes duplicate during interphase b. The first division separates homologous pairs; the second division separates sister chromatids c. A single division occurs, separating sister chromatids Homologous chromosomes pair up and form chiasmata d. Daughter cells contain recombinant chromosomes e. Process starts with a diploid cell Homologous pairs of chromosomes line up on the metaphase plate f. End result is four haploid cells that are genetically different from each other and the parent cell g. Duplicated chromosomes line up Individually on the metaphase plate in a diploid cel h. End result is two diploid cells that are genetically identical to each other and the parent cell Mitosis Melosis Both mitosis and meiosis
Answer:
Mitosis:
A single division occurs, separating sister chromatids
End result is two diploid cells that are genetically identical to each other and the parent cell
Meiosis:
The first division separates homologous pairs; the second division separates sister chromatids
Homologous chromosomes pair up and form chiasmata
Homologous pairs of chromosomes line up on the metaphase plate
Daughter cells contain recombinant chromosomes
End result is four haploid cells that are genetically different from each other and the parent cell
Mitosis and Meiosis:
Chromosomes duplicate during interphase
Process starts with a diploid cell
Duplicated chromosomes line up Individually on the metaphase plate in a diploid cell
Explanation:
Mitosis is the division of vegetative cells while meiosis involves the division of sex cells. Both divisions start with diploid parental cells but while the daughter cells in mitosis are also diploid, those of meiosis are haploid. This is why mitosis is referred to as equational division while meiosis is known as reductional division.
A cell that will undergo mitosis or meiosis would first have its genetic materials duplicated during interphase in addition to the synthesis of other important biochemicals such as proteins. Mitosis involves just a single division of the sister chromatids with two genetically identical daughter cells who are also clones of the parent cells resulting.
Meiosis, on the other hand, involves two divisions - the first one happens to separate homologous chromosome pairs while the second division separates sister chromatids just like in mitosis. During the early stage of meiosis, homologous chromosomes synapsed through the formation of a synaptonemal complex to form tetrads. Thereafter, synapsed chromosomes exchange chromosomal segments at a point known as chiasmata. All these happen at the prophase stage of meiosis I. The paired homologous chromosomes are then lined up at metaphase where they are engaged by the spindle fibers.
Meiosis II and mitosis are more or less the same with the chromosomes condensing at the prophase and the formation of metaphase plates at the metaphase. Sister chromatids are pulled apart and they migrate to the opposite poles at the anaphase and telophase.
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:
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.
What are some of the potential consequences of eating large fish like halibut more than a few times per month?
Answer:
They break down to form uric acid ,which can contribute to gout and the development of kidney stones for some people.
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.
12. What would be the other strand of DNA?
-A T C C G A A GTC C GA G-
Answer:
TAGGCTTCAGGCTC
Explanation:
The complementary base of Adenine is Thymine in a DNA strand but it is Uracil if it's a Mrna strand
then the complementary base of cytosine is therefore guanine
__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
Which is a component of the biosphere?
bacteria
argon
mountains
D.
permafrost
Reset
Next
Answer:
bacteria
Explanation:
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
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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In working with Drosphilia it is common to use a balancer stock to maintain mutations of interest. The balancer chromosomes are generally carrying multiple inversions on them. What effect would the inversions have on meiosis
Answer:
Fusion or pairing does not occur.
Explanation:
Inversions mutation leads to lowered fertility due to production of unbalanced gametes in the meiosis cell division. Chromosome inversions have no effect on mitosis, but they has affect meiosis because inversions changes the gametes which is only present in meiosis. If an inversion present is in the heterozygous condition, pairing of chromosomes cannot occur in a simple linear fashion due to change of sizes. But if the inverted chromosome segment has the proper size so it can paired with each other.
Chromosomal sex, also known as genetic sex, is determined genetically through the chromosome combination XX or XY.
Question 12 options:
True
False
Answer:
it's true
I hope it's helps you
Yes, it's true. Chromosal sex is currently determined through the chromosal combination.
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.
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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
How the aging is related with the methylation? The methylation increase or decreased ?
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
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
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.
The difference between a pH of 5 and a pH of 8 is
Group of answer choices
A) 3x
B) 30x
C) 100x
D) 1,000x
Answer:
The correct answer is - D) 1000x.
Explanation:
pH is a logarithmic scale, 1 reading change leads to the results in ten-fold in the H+ concentration in acidity/basicity. The more H + ions found in solution, the more acidic the substance is as acids donate H + ions.
You can calculate the concentration of H + from the pH and the equation
p H = − log [ H + ]
arrange again
[ H + ] = 10 − p H
So for a pH of 8, we get [ H + ] = 10 ^− 8
For a pH of 5, we get [ H + ] = 10^ − 5
10 ^−5 /10 ^− 8= 10 ^3
= 1000
identifying earths four spheres
match each of earths spheres
Answer:
cryosphere → glaciers, ice caps, ice bergs
atmosphere → air surrounding earth
biosphere → all of Earth's living things
geosphere → Earth's interior, rocks, minerals, and landforms
hydrosphere → oceans, lakes, rivers, streams, and groundwater
Explanation:
The above are properly matched.
Cryosphere is known as part of the earth were water is in solid form. This has to do with glaciers, ice, ice bergs, etc.
Atmosphere has to do with the part of the earth that is gaseous. This has to do with the air found on earth.
Biosphere is the living part of the earth. All things are found in the biosphere.
Geosphere is known to be earth itself which is made up of the landforms, rocks, minerals, earth's interior, etc.
Hydrosphere has to do with the liquid part of the earth. It has to do with the water bodies.
what similes best describes how your mind learns and remember
Answer:
The mind is like a: filing cabinet.
Explanation:
