Answer:
A short double-stranded RNA, one of whose strands can block gene expression
Explanation:
SiRNA, also known as short interfering RNA, is are short double stranded DNA that binds to mRNA for the purpose of destroying the mRNA sequence, hence, preventing it from being translated into a protein.
According to this question, SiRNA can be described as a short double-stranded RNA, one of whose strands can block gene expression (translation of mRNA).
16.
What term collectively describes the following substances: thickeners, colourings, flavourings and
dyes?
Food additive is term that collectively describes thickeners, colourings, flavourings and dyes.
What are food additives?"Food additives are substances added to food to preserve flavour or enhance taste, appearance, or other sensory qualities."Sugar, salt, vinegar, etc. helps in preservation of food.What are thickeners?"Thickeners are substances which increases viscosity of liquid. Examples: corn-starch, wheat flour, etc."Hence, the term collectively describing the substances: thickeners, colourings, flavourings and dyes is known as food additive.
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What is natural selection?
- A prodded that selects variations that help with survival and that spreads the variations to more offspring
-A process through which nature select an individual within a population for extinction
-A process that causes all populations to gradually increase in size
-A process that causes random variations to appear in the offspring of every generation
A process that selects for variations in a population that help with survival and that spreads the variations to more offspring.
What does aerobic respiration require?
Answer:
Aerobic respiration requires oxygen.
3 ways in which our atmosphere is not like a greenhouse
( HELP ME PLEASE)!!!!
Answer:
1.) The atmosphere is an open system, with heat energy always escaping to space. Unlike the glass it absorbs 95% of the UV in the creation of ozone. This sounds insignificant, but one scientist argues variation in the 5 percent is the cause of warming.
2.) There are no winds in a greenhouse. In the greenhouse and in the atmosphere energy is partly transferred from the heated surfaces through collision between air molecules (conduction). However, in the atmosphere a large portion of that heat is transported vertically by rising air currents (convection), and also horizontally by advection or commonly wind. There are no winds in a greenhouse.
3.) Heat reduction in a greenhouse requires a physical change with a vent to let LW escape or a screen to block SW entering. Clouds are nature’s screen. However, they can block SW and LW, such that we have little idea how clouds work to modify temperatures
Explanation:
The basic idea of a greenhouse is that sunlight or shortwave (SW) energy passes through the glass and heats surfaces. The surfaces radiate that heat as longwave (LW) energy or sensible heat (heat you can feel). LW cannot pass through the glass, so is trapped and raises the temperature in the greenhouse; the glass acts like a one-way valve. A greenhouse is a closed system because the heat cannot escape unless artificially changed by opening vents or blocking sunlight. The glass supposedly represents the entire atmosphere. It also blocks 100 percent of the ultraviolet (UV) portion of the sunlight.
PLEASE HELP ITS URGENT What is the functionof the peripheral nervous system? A. To transmit signals between the body and the brain or spinal cord B. To transmit signals related to movement of the hands and feet C.To transport blood to the brain D. To transport oxygen and nutrients throughout the body
Answer:
The peripheral nervous system (PNS) is one of the two components of the nervous system, the other part is the central nervous system (CNS). The PNS consists of the nerves and ganglia outside the brain and spinal cord.[1] The main function of the PNS is to connect the CNS to the limbs and organs, essentially serving as a relay between the brain and spinal cord and the rest of the body.[2] Unlike the CNS, the PNS is not protected by the vertebral column and skull, or by the blood–brain barrier, which leaves it exposed to toxins and mechanical injuries. The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. In the somatic nervous system, the cranial nerves are part of the PNS with the exception of the optic nerve(cranial nerve II), along with the retina. The second cranial nerve is not a true peripheral nerve but a tract of the diencephalon.[3]Cranial nerve ganglia originated in the CNS. However, the remaining ten cranial nerve axons extend beyond the brain and are therefore considered part of the PNS.[4] The autonomic nervous system is an involuntary control of smooth muscle and glands. The connection between CNS and organs allows the system to be in two different functional states: sympathetic and parasympathetic
Explanation:
2. The excretory system consists of:
Answer: The excretory system is largely associated with the urinary, or renal, system. This system consists of various organs that produce and then excrete the urine out of the body: the kidneys, ureters, the bladder, and the urethra. They include the kidneys, large intestine, liver, skin, and lungs. The kidneys filter blood and form urine. They are part of the urinary system, which also includes the ureters, bladder, and urethra. Each kidney has more than a million nephrons, which are the structural and functional units of the kidney.
Explanation:
3. Label the parts of the digestive system on the image below by typing in the organ name next to the corresponding letter.
Answer:
A. Salivary Gland (I believe)
B. Esophagus
C. Liver
D. Stomach
E. Pancreas
F. Small intestine
G. Large Intestine
14. In one to two sentences, what are some ways to mitigate climate change?
altruistic behavior
Answer:
The North produced 17 times more cotton and woolen textiles than the South, 30 times more leather goods, 20 times more pig iron, and 32 times more firearms. The North produced 3,200 firearms to every 100 produced in the South.
Explanation:
ecosystem contains both blank and blank parts
Explanation:
Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts.
A probability of 1/4 is equal to a probability of 75%
True or False
In what kind of star system does one star sometimes block the light from another?
1. Open Cluster
2. Globular cluster
3. quasar cluster
4. eclipsing binary
In a certain ecosystem, there is a large number of rabbits which graze upon grass. Rabbits are herbivores, which means they only eat plant material. Later, a population of wolves is introduced into this ecosystem. Wolves are carnivores, which means they only eat meat.
How will the introduction of wolves into this ecosystem affect the other organisms?
A.
The change will be helpful to the rabbits and the grass.
B.
The change will be harmful to the rabbits but helpful to the grass.
C.
The change will be helpful to the rabbits but harmful to the grass.
D.
The change will be harmful to the rabbits and the grass.
Answer:
b
Explanation:
What are the 4 steps of mitosis? What occurs during each?
Explanation:
There are four stages of mitosis: prophase, metaphase, anaphase and telophase.1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister chromatids are pulled to opposite poles of the cell 4) Telophase: nuclear envelope reforms, chromosomes unfold into chromatin, cytokinesis can begin The order of the stages of mitosis can be remembered using the mnemonic PMAT.
59:14 Organisms that live in the tundra have developed unique adaptations that aid in their survival. Ursus maritimus has a variety of adaptations which enable it to survive in the tundra. It is the largest terrestrial carnivore, but it is also an excellent swimmer that spends much of its time in and near the water hunting its favorite food. It has large paws with small bumps to provide traction as it walks across the ice. Its fur is helpful as camouflage during the winter months, but not as helpful during the summer. Which organism has the adaptations described that enable it to survive in the tundra
Answer:
Polar bear.
Explanation:
Polar bear is the organism that has the adaptations which enable it to survive in the tundra. the polar bear has white skin and fur on all its body which helps it to camouflage in the ice and to prevent the loss of heat from its body. The polar bear catch its favourite food in the water which is the fish that provide high nutrition to the polar bear. It is a good swimmer and have large paws with small bumps that helps it to provide support while walking on the ice. The scientific name of polar bear is Ursus maritimus whose features are described in the question.
5. Which climate type forms the thickest soil the quickest?
Science question(I would appreciate your assistance)
What muscle connects your neck and shoulder, what does this muscle do?
4. Some cells, such as human nerve and muscle cells, contain many more mitochondria
than do other cells, such as skin cells. Infer why some cells have more mitochondria
than others. (SB1a)
A. The cells divide more frequently.
B. The cells use more energy.
C. The cells store more nutrients.
D. The cells degrade more proteins.
✓ B) The cells use more energy.
Some cells such as human nerve and muscle cells.
Some cells have more mitochondria because the cells use more energy. The correct option is B.
What are mitochondria?Mitochondria are the powerhouse of the cell. It is a long cylindrical organelle. Some cells contain more mitochondria than others because they require more energy. The mitochondria store energy for the function of the cell.
So, for example, the muscle contains a lot of mitochondria, as does the liver, the kidney, and, to some extent, the brain, which runs on the energy that those mitochondria make.
Depending on the function of the cell, several mitochondria are frequently found in one cell. Mitochondria, like other organelles, are found in the cytoplasm of cells.
Therefore, the correct option is B. The cells use more energy.
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Please Help- Which of the following conclusions would be best supported by the fossil record?
Rocks can destroy trees.
Animals need leafy tees.
Trees give off oxygen.
The environment has changed.
Answer:
D
Explanation:
Which statement explains a major taxonomic difference between fungi and plants? A) plant cells are terrestrial, while fungi cells are aquatic. B) plant cells are heterotrophic, while fungal cells are autotrophic. C) plant cell walls contain cellulose, while fungal cell walls contain chitin. D) plant cell walls surround a cell membrane, while fungal cell walls surround a plasma membrane
Answer:
the answer to this question is A
A researcher studied the development of resistance to antibiotics by bacteria. She studied several antibiotics to determine how long it took for bacteria to develop resistance. She found that, on average, it took eight years for bacteria to develop resistance to an antibiotic. In some cases, bacteria developed resistance to an antibiotic within a year, and none of the antibiotics were still completely effective on bacteria after 30 years.
How is this possible?
Answer:
See Explanation
Explanation:
Antibiotic resistance is said to have occurred when a given antibiotic drug is no longer effective against the target organisms. This is as a result of genetic mutation in the organism that enable resistance to the drug.
When a drug is being used against a particular organism, the organism gradually develops genetic mutations that helps it to inactivate the antibiotic drug and increase its chances of survival. These traits are passed on to offspring, hence the onset of resistance to antibiotic drugs.
There are different mechanisms of antibiotic resistance which include; Degrading the antibiotic drugs by the use of enzymes secreted by the organism, altering proteins present in the organism upon which the antibiotic drug acts and changing membrane permeability to antibiotic drugs.
Which statement describes characteristics of planarians?
They live in freshwater, are free-living, and reproduce sexually and asexually.
Most planarians are found in freshwater. Since they reproduce through fission, they reproduce asexually. However, since they are heteromorphic, they also reproduce sexually.
Why is cloning embryonic stem cells a “holy grail” for scientists?
A-It will allow scientists to clone people.
B-It can help scientists understand diseases.
C-It will allow scientists to raise the specter of controversy
D-It will allow scientists to make personalized medicine.
Answer:
The answer is D) It will allow scientists to make personalized medicine.
Explanation:
I used the context of the article where they stated "So for years, scientists have been trying to use cloning techniques to make embryonic stem cells that are essentially a genetic match for patients. The idea is that such a close match would prevent their bodies from rejecting the cells."
Cloning embryonic stem cells is a “holy grail” for scientists because it will allow scientists to make personalized medicine.
What is Cloning?
This is the process which involves making exact genetic copies of a living organism.
Cloning embryonic cells will ensure that scientists are able to make personalized medicine as we have unique genetic makeup thereby making option D the most appropriate choice.
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Using the following words, explain the difference between
DNA and RNA.
Nucleus, uracil, double helix
Help Me please ASAP!!!!!!!!!
Answer:
the answer is 3 and that's it
distinguish between plant and animal cell
Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not
Explanation:
hope this helps
A mutation in a gene results in an animal that cannot make a protein that allows muscles to contract which of these is most likely to happen
Answer:
it will get weaker give water
Explanation:
feed it bread
A heritable change in a person's genetic makeup is referred to as a mutation. Changes can be substantial or negligible. Chromosomes or chromosome parts may be lost, added, duplicated, or rearranged in significant alterations. Thus, option B is correct.
What mutation in a gene results in an animal?High-energy sources like radiation or chemicals in the environment can both result in mutations. They may also emerge on their own during DNA replication. The two main kinds of mutations are chromosomal abnormalities and point mutations.
Mutations can alter an organism's phenotype, which is its outward appearance, or they can have an impact on the way DNA encodes the genetic information (genotype). When mutations happen, they might kill an organism completely or only partially.
The likelihood that a gene mutation will cause an animal to be unable to produce the protein necessary for muscles to contract is that the animal will perish before producing any progeny.
Therefore, The animal will die before having any offspring.
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The above given question is incomplete. The complete question is given below:
A mutation in a gene results in an animal that cannot make a protein that allows muscles to contract. Which of these is most likely to happen? * A. The gene will eventually be found in all animals of the species. B. The animal will die before having any offspring. C. The gene will change back to the normal form. D. The animal will pass this gene on to many offspring.
Based on the living things in the pyramid, please tell me what examples would fit into these categories:
Primary Producers, primary consumers, secondary consumers, and tertiary consumers.
Answer:
Primary producer = Oak tree leaves
Primary consumer = Caterpillars
Secondary consumer = Blue j a y s
Tertiary consumers = Hawk
Explanation:
An energy pyramid is a graph which shows how energy is transferred or flows from one trophic level to the next. Organisms which occupy the same level in the food chain within an ecosystem belong to the same trophic level.
The shape of an an energy pyramid is a pyramid indicating that the number of living things as well as the amount of energy flow decreases as one goes from one lower trophic level to the next higher level.
At the base of the pyramid are the primary producers which use energy of the sunlight to manufacture their own food. Example is the Oak tree.
The next higher level is the primary consumers who feed directly on the primary producers. For example caterpillars.
The next higher level is the secondary consumers who feed on the primary consumers. For example the Blue j a y s.
The highest levelin the pyramid is the tertiary consumers who feed on the secondary consumers. For example, the hawk.
i'm working on a lab report on water erosion on edg lol
pls help i'm so behind
is it okay??
Some facts about Water erosion :
Water erosion is the detachment and removal of soil material by water. The process may be natural or accelerated by human activity. ... Water erosion wears away the earth's surface. Sheet erosion is the more-or-less uniform removal of soil from the surface.
Water and Wind Erosion (cause)
Water erosion is the removal of soil by water and transportation of the eroded materials away from the point of removal. Water action due to rain erodes the soil and causes activities like gully, rill, and stream erosion leading to the downstream effects of flooding and sedimentation.
I’ll give a lot of points just please help and has to be the correct answer
Answer:
The ocean continued to shrink until, about 270 million years ago, the continents that were ances tral to North America and Africa collided. Huge masses of rocks were pushed west ward along the margin of North America and piled up to form the mountains that are now the Appalachians. Well, mountains are limited in their theoretical height by several processes. First is called isostasy the bigger a mountain gets, the more it weighs down its tectonic plate, so it sinks lower. The second is called glacial buzzsaw the taller and colder a peak, the faster snow and ice will wear it down/away.
Explanation:
Hope that helps you.
how many inches of rain is to be expected in the Temperate forest biome per year?
A:10-23
B:11-27
C:12-35
D:17-40