the method of passing microorganisms by touching is called:
Answer:
it is called communicable
DNA is coded to RNA, which must travel from the nucleus to the cytoplasm to be read. Why does the cell need to transcribe the DNA into RNA rather than copying the DNA directly?(1 point)
DNA requires too much energy to code; building RNA is more efficient.
DNA cannot be copied; it must be translated to RNA and then back to DNA.
DNA is double stranded and cannot fit through the nuclear membrane; RNA is single stranded.
DNA cannot be read by ribosomes; they can only read RNA.
Answer:DNA is double stranded and cannot fit through the nuclear membrane; RNA is single stranded.
Explanation:
DNA is double stranded and cannot fit through the nuclear membrane; RNA is single stranded. DNA could get damaged because of the osmotic nature of cytoplasm. Therefore, option (C) is correct to mitigate he damage.
What is transcription?The proteins are produced by cells by the transcription and translation of certain genes from their DNA into molecules of messenger RNA (mRNA), chains of amino acids, and finally fully functioning proteins.
The DNA would need to go to the cytoplasm in order to directly make proteins. Because of the osmotic properties of cytoplasm, DNA may become damaged during the translocation process. The cellular machinery does not directly make proteins from DNA in order to reduce the harm.
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Explain why contractile vacuoles would be of little value to one-celled organisms living in the ocean (salt water)
The organisms living in an aquatic environment have to undergo osmoregulation and survive in a hypotonic environment. The organisms such as paramecium, protists, and unicellular algae have contractile vacuoles.
The functions of the contractile vacuoles include:
1. Contractile vacuoles help in the osmoregulation, such that the movement of solute particles inside and outside of the cells.
2. The contractile vacuoles are also required to remove excess water from the organisms.
3. The vacuoles contract to discharge the fluid for the survival of organisms like paramecium and algae.
Thus, the contractile vacuoles contract to allow the organisms to survive in a hypotonic environment.
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Why are fossils important to developing a theory of evolution?
Answer:
Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. ... Paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms
Explanation:
Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. ... Paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms
The preserved remnants or traces of extinct animals, plants, and other organisms are known as fossils. Because they demonstrate that earlier life on Earth was distinct from the life observed today, fossils are crucial pieces of evidence for evolution.
What is evolution?According to the idea of evolution, modern life forms have evolved from more ancient ones.
The original theory suggested that this occurred slowly and gradually, but fossil evidence suggests that the process occasionally went wrong and engaged in some very bizarre experiments.
Therefore, they demonstrate that earlier life on Earth was distinct from the life observed today, fossils are crucial pieces of evidence for evolution.
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A. How are radio waves used to create radar maps?
B. How does reflectivity help meteorologists figure out the weather shown on
radar maps?
Answer:
A. These signals have been calibrated against actual visual and location readings for the amount of rain falling and cloud water content. ... Thus the computer generates a visual image according to the reflectivity of the amount of water in colors on a map.
B. Reflectivity of an object helps indicate the amount of water that a cloud may carry. The stronger the reflected signal from the radar signal sent out, the easier the meteorologist will be able to tell what to expect. ... This in turn is interpreted by the meteorologist from past experience as what to expect in the future.
describe in detail, the pathway of an oxygen molecule as it moves from the air outside your body, into your blood and to cell in a muscle in your arm
Answer:
The oxygen molecule enters the human body from the mouth or nose and reaches the phraynx and then the larynx, trachea and the bronchus. It then enters the lungs which then the red blood cells takes the oxygen from the blood and carries it to the muscle in the arm.
The pathway of an oxygen molecule from the air outside your body to a muscle cell in your arm involves several sequential steps, including inhalation, gas exchange in the lungs, transportation through the bloodstream, and diffusion into muscle cells.
During inhalation, you breathe in air through your nose or mouth. The air travels through your respiratory system, passing through the trachea (windpipe) and into the bronchi, which branch into smaller tubes called bronchioles. Eventually, the inhaled air reaches the alveoli, tiny air sacs located at the end of the bronchioles in the lungs.
In the alveoli, oxygen molecules diffuse across the thin walls of the air sacs and into the surrounding capillaries. Oxygen diffuses from an area of higher partial pressure (in the alveoli) to an area of lower partial pressure (in the capillaries). Hemoglobin, a protein within red blood cells, binds to the oxygen molecules in the capillaries, forming oxyhemoglobin.
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If an organism's DNA contains 30% adenine nucleotides, what percentage of its DNA is composed of thymine nucleotides
Which would be least likely to be affected by a density-dependent limiting 4
factor?
O a small population of tigers scattered across a wide area
O a rapidly reproducing population of bacteria
a large, dense population of fish in a pond
a population of birds with a high immigration rate
Answer: a small population of tigers scattered across a wide area
Explanation:
Hope this helps
Answer:
The answer is a. a small population of tigers scattered across a wide area
the organ of smell and taste are closely related discuss?
Answer:
They are closely related because the bose and mouth are connexted through the same airway. You taste and smell at the same time.
Arolium uses in a cockroach.pleasehelpme.
Answer:
just run away ........ ok save yourself
3. How does a tongue help in the process of digestion?
Answer:
the tongue helps in the process of digestion by facilitation the movement of food while chewing and assisting the process of swallowing
Explanation:
a red onion cell has undergone a change, as represented in the diagram below. This change is most likely due to the cell being placed in...
A red onion cell placed in a saline solution will lose water when water moves from the cell to the surrounding hypertonic medium via osmosis, causing the cell to shrivel up.
What is osmosis?The passage of solvent molecules from a lower concentration solution to a higher concentration solution across a semipermeable membrane. It is a passive process that occurs without the use of any energy.
Solvent molecule transfer proceeds from low to high concentration regions until the concentrations on both sides of the membrane are equal.
What are the types of osmosis?An isotonic solution contains the same solute concentration both within and outside the cell.A hypertonic solution has a larger solute concentration outside than inside the cell.A hypotonic solution contains a larger concentration of solutes inside the cell than outside.Thus, we can conclude that when a red onion cell is placed in salt water.
As we can see in the diagram the onion cell shrink which means it is placed in salt water which is a hypertonic solution.
So, option (3) salt water is correct.
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The force the Earth exerts on the sun is equal in magnitude to the
force the sun exerts on the Earth.
O True
o False
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The given statement is true, because according to Newton's third law of motion ~ " Every action has an equal and opposite reaction " .
Joanna was chewing gum and talking to her friend when suddenly she swallowed her gum. Which phase of swallowing was most likely involved in the accidental swallowing of her gum
The phase of swallowing that was most likely involved in the accidental swallowing of her gum is the pharyngeal phase.
There are different phases of swallowing is divided into three, namely:
oral phasepharyngeal phase andesophageal phaseThe oral phase is voluntary while the pharyngeal and the esophageal phase is involuntary.
The pharyngeal phase involves the movement of the bolus of food from the oropharynx into the esophagus.
Since the Joanna accidentally swallowed her gum, it is an involuntary action of the pharyngeal phase of swallowing.
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PLLLSSS HELP ME I WILL GIVE BRAINIEST
in the Fall of the year, leaves appear red, orange, yellow and brown because the chlorphyll decreases in the leaves and allows the --(blank)-- pigments to reflect mostly colors other than green.
possible answers than can go in the blank are primary or accessory
The appropriate word to fill into the blank would be accessory.
In the Fall of the year, leaves appear red, orange, yellow, and brown because the chlorophyll decreases in the leaves and allows the accessory pigments to reflect mostly colors other than green.
The core pigment in leaves that makes them appear green is chlorophyll. The pigment is primarily responsible for absorbing light energy to drive the photosynthetic process in plants.
Some other pigments, also known as accessory pigments such as carotenoids, anthocyanins, xanthophylls, etc., help out chlorophyll in some ways but have colours that are different from green.
Thus, the appearance of other colours such as orange, yellow, brown, etc., on leaves is due to a decrease in chlorophyll and the reflection of the colours of the accessory pigments.
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Which of the following is the female gamete?
Answer:
a. Ovum is correct
Explanation:
Why is RNA thought to have been the first genetic material? A. RNA has been found on meteorites. B. Primitive organisms, such as some viruses, have RNA as their genetic material. C. RNA is capable of self-replication D. RNA is structurally simpler than DNA.
Answer:
B.
Explanation:
Because if they have traces of RNA in them, then it might be the first genetic material
What are Spore-bearing structures in fungi called what?
Answer:
Fruting bodies
Explanation:
Fungi can produce spores on somatic hyphae or on special spore producing hyphae which are arranged into structers called fruting bodies.
Which of the following is a natural event that is part of the long-term carbon cycle? (1 point)
A. Earthquakes
B.Tsunamis
C.Blizzards
D. Volcanic eruptions
Answer:
Which of the following is a natural event that is part of the long-term carbon cycle?
A. EarthquakesWhich statement is supported by the atomic theory? A. Atoms combine to make all the substances on earth
Answer:
this is not true.
B) atoms of all substances are identical in all respects..
Dalton's theory said - all atoms of one substance are identical. Atoms of different elements differ.
Explanation:
Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are classified as ___________ glands.
Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are called compound alveolar glands.
What is an exocrine gland?The exocrine gland secretes enzymes outside the gland through the duct. The gland can be unicellular, multicellular, compound, tubular, alveolar, etc. Their modes of functions vary too. An example of an alveolar gland is the mammary gland. Sweet glands are an example of tubular glands.
Hence, glands having branched ducts and sac-like secretory cells are called compound alveolar glands.
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explain how a molecule of carbon dioxide from the atmosphere teaches the site of photosynthesis in a leaf
Answer: On the surface of the leaves of the plants there are a large number of tiny pores known as stomata or stoma. For photosynthesis green plants take carbon dioxide from the air. The carbon dioxide enters the leaves of the plant through the stomata present on their surface. Each stomatal pore is surrounded by a pair of guard cells.
Explanation:
Question 2 (Multiple Choice Worth 2 points)
(01.02 MC)
Sucrose and lactose are two carbohydrates that have the same molecular formula (C12H22011). Which of the following
O They are made up of differentlmino acids.
O They are monosaccharides with different atoms bonded to their rings.
O They each have two glucose molecules, but the arrangement differs.
O They are made of different combinations of monosaccharides.
Question 3(Multiple Choice Worth 2 points)
Answer:
Last one is correct
Explanation:
Sucrose is made of glucose and fructose
Lactose is made of glucose and galactose
as of may 2020, carbon dioxide levels have reached 417 parts per million. what level should they be at to have the world in a climate similar to that in which civilization first developed?
Given what we know about global carbon levels in the present and the past, we can confirm that in order to be at the level of early civilizations, the modern-day carbon level should be at 280 parts per million.
Global atmospheric carbon levels are measured in parts per million. What this means is that for every one million units of mass in the atmosphere, 280 of them were carbon. This means that in recent years, the global carbon levels in the atmosphere have doubled.
The primary cause of these increased carbon levels is industrial pollution. Chemicals are released into the atmosphere as a by-product of industrial processess. This began with a noticeable spike during the industrial revolution and has then increased without end.
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If there is oxygen around, how will yeast cells make ATP?
ummm mom mm mmmmmmmmmmmmmm
what hormone directly opposes the actions of natriuretic hormones?
The hormone that directly opposes the actions of natriuretic hormones is aldosterone.
Aldosterone is a hormone produced by the adrenal glands, specifically the adrenal cortex. It acts on the kidneys to promote the reabsorption of sodium ions and the excretion of potassium ions.
Natriuretic hormones, on the other hand, promote the excretion of sodium ions and the reabsorption of potassium ions in the kidneys, leading to increased urine production and decreased blood volume.
Therefore, aldosterone counteracts the effects of natriuretic hormones by increasing sodium reabsorption and reducing potassium excretion, which helps to retain water and maintain blood pressure.
In summary, while natriuretic hormones promote sodium excretion and water loss, aldosterone works in the opposite direction by promoting sodium reabsorption and water retention.
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if the carrying capacity for the north atlantic cod on the grand banks of newfoundland is 500,000 tons, when do you expect that the rate of population growth would be greatest?
If the carrying capacity for the North Atlantic cod on the newfound land is 500,000 tons, then we would expect that when there are 250,000 tons of cod on the grand banks, the population growth will be greatest.
The carrying capacity speaks volumes about the maximum amount of a species population that the ecosystem can sustain permanently provided there is the availability of water, food, habitat, and other life essentials.
In terms of population ecology, it is defined as the maximum burden that the environment can tolerate.
In population ecology, populations normally decrease above the carrying capacity while they increase below the carrying capacity. A decline in population size above the carrying capacity can be caused by a variety of factors, such as a lack of sunshine, space, or food availability.
Therefore, we can conclude that If the carrying capacity for the North Atlantic cod on the newfound land is 500,000 tons, the rate of population increase will be maximum and greatest when there are 250,000 tons of cod on the Grand Banks.
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Food travels from the mouth to the stomach via the __________. A. Gallbladder B. Liver C. Intestines D. Esophagus Please select the best answer from the choices provided. A B C D.
Answer:
Esophagus
Explanation:
The esophagus is a muscular tube extending from the pharynx and behind the trachea to the stomach. Food is pushed through the esophagus and into the stomach by means of a series of contractions called peristalsis.
Answer:
The answer is D. Esophagus
What parts of our eyes help us see light?
Answer:
it's called the renting it controls the pupil
Explain how a wholemeal sandwich with tuna and tomatoes will be broken down by the digestive system. Start the process from the mouth and end at the anus.
Answer:
All of our energy and nutrition come by way of the gastrointestinal (GI) tract. It is an amazing machine well designed for digesting and absorbing nutrients and for shielding the rest of the body from microorganisms, viruses and other foreign matter. The GI tract spans from the mouth to the anus, with each separate organ having a role in digestion, absorption or excretion.Lastly, if you would like to learn more about yourself and how you can best reach your own nutritional and fitness goals, we encourage you to take a look at the following home health testing guides and resources:
Food Sensitivity Testing Guide
DNA Health Testing Guide
Guide to Life Extension Products
Home Health Testing Guide
Everlywell Home Tests Guide
Home Testing for Heavy Metals
Explanation:
(: tsorry hope to help