Answer:
a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.
Explanation:
A cell wall is an external, rigid structure found in plant, fungal, and some protist cells. Composed of varying molecules according to the type of cell, it protects the cell and maintains its shape.
Explanation:The cell wall is a rigid structure that exists external to the plasma membrane in certain cells, particularly in plant cells, fungal cells, and some protist cells. It is primarily composed of various molecules including cellulose in plants and chitin in fungi. The cell wall serves to both protect the cell from environmental stresses like desiccation, changes in osmotic pressure, and traumatic injury and provides structural support, maintaining the shape of the cell. The composition of the cell wall can vary depending on the type of cell in question. For instance, in the case of plant cells, the cell wall is mainly composed of cellulose which is a polysaccharide comprised of glucose units. An example of how this works in everyday life would be when you bite into a raw vegetable like celery, the crunch comes from when the rigid cell walls of the celery's cells get torn by your teeth.
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General Formula: (CH2O)n where n is the number of carbon atoms. example: The sugar glucose is a small carbohydrate; its n equals 6. Therefore, its chemical formula is __________
Answer: C6H12O6
Explanation: glucose is the simplest sugar. As N is the number of the carbon atom, when we multiply 6 into the inner basic formula then (CH2O) convert into C6H12O6. As the number of carbon atom changed the formula of sugar also changed.
Rather than pay for an oil change at the service station, Justin decides to do the job himself. He drains the used oil
and antifreeze directly into the ground in the alley beside his house. After several years, he notices there are no
more frogs in the pond behind his house. What type of pollution is demonstrated in this real world example?
Toxic
Sediment
Nutrient
Bacterial
Answer:
The answer is: Toxic Pollution
Explanation:
"Toxic pollution" refers to contaminating the surroundings with toxic or hazardous chemicals and wastes. This kind of pollution is dangerous as it causes birth defects and death of organisms.
The problem with Justin's situation above is that, he used the oil and antifreeze DIRECTLY into the ground. Antifreeze is also known as an "engine coolant." This is a toxic chemical that should not be ingested. The frogs from the pond behind his house must have ingested the engine coolant, thus resulting to their deaths. It is said that animals are attracted to its smell, thus they are more prone to ingesting or drinking it.
If you are doing it on your own without going to the service station, it is best to bring the substance to the appropriate facility that disposes it. However, in case you spill it accidentally, you may pour some soap and water so it can be mixed together, thereby reducing its toxicity.
what do the horizontal lines mean on the following graph ?
During the horizontal line, the body was not increasing height, was vertically at rest.
Explanation:
The graph given here is a graph between the elevation and time. This graph plots movement of a body on its y axis vs time where it's seen that the body is increasing steadily in height for the first 2 minutes from when it suddenly takes a horizontal line. It means that after 2 mins, the body comes to a rest at the vertical movement. For the next 3 mins, the body remained as the same state of movement, at vertical rest. After that, the body started coming down i.e decreasing its height for the next 2 mins. Then it again started increasing its height from reference ground, untill 9 mins after which it again came at vertical rest.
A mutation that inactivates the regulatory gene of a repressible operon in an E. coli
cell would result in
a. continuous transcription of the structural gene controlled by that regulator.
b. complete inhibition of transcription of the structural gene controlled by that
regulator
c. irreversible binding of the repressor to the operator.
d. inactivation of RNA polymerase by alteration of its active site.
e. continuous translation of the mRNA because of alteration of its structure.
Question
Final answer:
A mutation inactivating the regulatory gene of a repressible operon leads to uninterrupted transcription of the regulated structural genes, due to the repressor protein no longer being able to inhibit RNA polymerase.
Explanation:
A mutation that inactivates the regulatory gene of a repressible operon in an E. coli cell would result in continuous transcription of the structural gene controlled by that regulator. This is because the repressor protein, which is coded by the regulatory gene, can no longer bind to the operator. This unbound state leaves the RNA polymerase able to bind to the promoter freely and thus transcribe the structural genes without interruption.
A lithium atom has lost an electron comes near a chlorine atom that has gained an electron. what happens?
Answer:
Redox reaction
Explanation:
Redox reaction involves both reduction and oxidation of substances. The lithium atom is reduced as it loses the electron while chlorine is oxidised as it gains an electron. An equilibrium state is obtained and lithium chloride is formed.
Answer:
they form an ionic compound sry for the late response lol
Explanation:
Which description best fits the activity of a cell during interphase?
Question 11 options:
The cell carries on metabolism.
The cell differentiates to have a new function.
The cell splits in two.
The cell splits in two but with half the normal number of chromosomes.
Answer:
The correct option is A) The cell carries on metabolism.
Explanation:
During the interphase, the cell tends to carry out its normal cell activities and it prepares itself for the cell division process during the interphase. It synthesizes proteins etc which will be required for cell division during this phase. The cell becomes enlarged during this phase. A cell tends to spend most of its time in the interphase. Hence, option A is correct.
Other options, like option C, cannot be considered to be true because the process of cell splitting does not occur during the interphase, It happens during the process of cytokinesis.
Large areas of land are being developed. In the process thousands of trees are being removed and bumes
How would this affect the cycle?
Removing trees in large amount can cause climate change, extinction of species and hence the food cycle as well as the ecosystems
Explanation:
Deforestation is the major cause of climate change. The atmosphere gets filled with greenhouse gases which would lead to an increase in temperature. We need oxygen to live which is coming from the plants, removing would affect these cycles. several species of animals have been already extinct and continuation of this activity would end up the removal of many organisms from the food cycle and finally, we will be removed.
What is one advantage wind power has over solar power?
A. Wind turbines harm fewer animals than solar cells.
O
B. Wind turbines are more reliable than solar cells.
O
C. Wind turbines make less noise than solar cells.
O
D. Wind turbines take up less land space than solar cells.
Answer:I think the answer is D
solor palpnles take up an whole Feild while a wind turbine would‘t take up nearly as much.
Explanation:
Wind turbines take up less land space than solar cells is one advantage wind power has over solar power.
What is wind turbines?Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.
Wind flow patterns and speeds vary greatly across the United States and are modified by bodies of water, vegetation, and differences in terrain. Humans use this wind flow, or motion energy, for many purposes: sailing, flying a kite, and even generating electricity.
The terms "wind energy" and "wind power" both describe the process by which the wind is used to generate mechanical power or electricity. This mechanical power can be used for specific tasks (such as grinding grain or pumping water).
Therefore, Wind turbines take up less land space than solar cells is one advantage wind power has over solar power.
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Dyhybrid crosses are crossed between two parents with two different heterozygous genes true or false
Answer:
The statement is False.
Explanation:
Dihybrid cross is a type of cross that occur between two different genes which differ in their traits.The cross between homozygous dominant and homozygoys recessive traits results in 1:0:0:0 phenotypic ratio. The resulting offspring will have dominant phenotype but will have carriers of recessive phenotype.Explain how living things suck as people and trees are different from non living things such as rock and the text
Answer: because being a human sucks
Explanation: