Answer:
A. Chlorofluorocarbons
Explanation: short answer
Answer:
A. Chlorofluorocarbons
Explanation:
Halogens are a chemical family containing fluorine, chlorine, bromine and iodine; any carbon compound containing them is known as a halocarbon. While all halogens have the ability to catalyze ozone breakdown, they have an unequal impact on the ozone layer. A catalyst is a compound which can alter the rate of a reaction without permently being altered by that reaction, and so can react over and over again. In this fashion it is estimated that one molecule of chlorine can degrade over 100,000 molecules of ozone before it is removed from the stratosphere or becomes part of an inactive compound. These inactive compounds, for example ClONO2, are collectively called 'resevoirs'. They hold chlorine in an inactive form but can release an active chlorine when struck by sunlight. The relative potency of the different halogens depends a great deal on the stability of the resevior compounds. Hydrogen fluoride, HF, is so very stable that fluorocarbons have relatively no known impact on ozone. Bromine resevoirs, such as HBr and BrONO2, are much more easily broken up by sunlight; causing bromine to be from 10 to 100 times more effective than chlorine at destroying ozone. From 30-60% of bromocarbons released to the atmosphere are man-made (methyl bromide fumigants and halon fire extinguishers) and both compounds will soon be restricted by international agreement.
Please please help!!
Answer:
option 3
Explanation:
Which of the following is true
about true-breeding plants if they are allowed to self-pollinate?
A. They never have offspring with the same traits as the parent plant.
B. They have offspring with traits that are identical to the parent plant with one or two differences.
C. They always have offspring with traits identical to the parent plant.
Answer:
b
Explanation:
some are the same while others are different (traits)
Which of the following statements is correct regarding engineering maize plants with a herbicide-resistance gene using Agrobacterium-mediated plant transformation?
a. The Ti-plasmid used for this experiment must contain tumor-inducing genes.
b. The herbicide-resistance gene is cloned into the T-DNA region of the Ti-plasmid.
c. The herbicide-resistance gene is cloned into a region outside of the T-DNA in the Ti-plasmid.
d. A guide RNA is used to transfer T-DNA from Agrobacterium to the plant cell.
e. The whole Ti-plasmid containing the herbicide-resistance gene is inserted into the maize genome after infection with Agrobacterium
Answer:
b. The herbicide-resistance gene is cloned into the T-DNA region of the Ti-plasmid.
Explanation:
Ti-plasmid has the ability to introduce part of its DNA (t-DNA) into the genome of host plants. This is very important for the relationship of genetic manipulation in maize plants, with the aim of inducing a gene that promotes herbicide resistance. In addition, T-DNA has many genes that code for the production of plant growth phytohormones, which is extremely important for the cloning process to work. In this case, we can assume that the correct answer for yours is the letter B.
Suggest why most plants die very quickly if their roots are cut off
Answer:
because plants are living things, and so if someone cuts you in half, then you're most likley gointnto die pretty quick. HOWEVER.... ur body will still most likley be moving because of adrenaline and left over energy.
Answer:
They wouldn't be able to absorb water and other nutrients from the ground if their roots were cut off.
Which of these best explains how solid waste can harm wildlife?
Answer:
Solid waste damps are seriously spoiling the environmental conditions in developing countries. An inefficient municipal solid waste management system may create serious negative environmental impacts like infectious diseases, land and water pollution, obstruction of drains and loss of biodiversity.
Explanation:
i don't see any options!!
find the equation of the line joine points (2,2) and (-2,5).
Answer:
5x+4y-18=0.
Explanation:
1. the common view of the formula is:
[tex]\frac{x-x_1}{x_2-x_1} =\frac{y-y_1}{y_2-y_1};[/tex]
2. according to the formula above the required equation is:
[tex]\frac{x-2}{-2-2} =\frac{y-2}{5-2}; \ <=> \ 5x+4y-18=0.[/tex]
Passive smoking may be banned in cars. Explain
how this may affect the number of cases of
lung cancer. [2]
Answer:
It would decrease the number of lung cancer cases
Explanation:
Many patients with lung cancer don't have to be actively smoking so they can actually get lung cancer by secondhand smoking(passive) especially in cars as the air is polluted and the car is like a small compartment with polluted air( lung cancer occurs over long periods of prolonged exposure especially in children)
The young, coiled-up leaf in true ferns is called what
fiddleheads is the answer ~~~~
how can you lessen the harmful effect of soil erosion?
Answer:
Trees and other plants
Explanation:
Trees and plants prevent erosion by holding the soil together with their roots.
what is length?Name any two devices used for measuring the length.
Answer:
the size of something from one end to the other; how long something is
Running race tracktreeAnswer:
A length is how long something is.
ruler
Measuring tape.
Hello what is this? I need help quick pleasee
what is aa?? (in like volcanic terms)
Answer:
'A'ā (pronounced "ah-ah") is a Hawaiian term for lava flows that have a rough rubbly surface composed of broken lava blocks called clinkers. The incredibly spiny surface of a solidified 'A'ā flow makes walking very difficult and slow.
cual es la causa para que los oceanos se expanden entre 3 y 10 cm por año
Answer:
El calentamiento global causa que el nivel del mar se eleve, debido a que el hielo en las plataformas continentales se derrite y que el agua del océano se expande al calentarse.
Why can even low levels of a toxin have serious effects, if the toxin doesn't break down easily, like mercury?
Answer:
below
Explanation:
also depends on the immune system some people it'll effect greater due to a weaker immune system
3. Which of the following represents correctly paired nitrogen bases? (a) Adenine- Cytosine; (b) Cytosine-Thymine; (c) Guanine-Thymine; (d) Guanine-Cytosine.
Answer: The option that correctly represents paired nitrogen bases is D ( Guanine-Cytosine)
Explanation:
Deoxyribonucleic acid( DNA) is found in chromosomes which are located in the nucleus of cells. One of its main functions is to store the organism's hereditary traits and direct the day to day metabolic activities of each cell in the organism.
The DNA molecule consists of two strands that curve spirally to form a double helix structure which consists of:
--> phosphate,
--> A sugar called deoxyribose, and
--> Four nitrogenous bases—adenine, guanine, cytosine, and thymine
The four different NITROGEN BASES pair together in a way known as complementary pairing. ADENINE always pairs with THYMINE, and CYTOSINE always pairs with GUANINE.This is because of their molecular structures. Each base contains one or two nitrogen rings, which makes it long or short. It also has a sticky end of binding sites that connects with exactly one other base.
--> Adenine is long and has two binding sites.
--> Thymine is short and has two binding sites.
--> Guanine is long and has three binding sites.
--> Cytosine is short and has three binding sites.
From the above analysis, GUANINE can only bind to CYTOSINE.
What keeps the inner core in a solid state?
A. Low temperature
B. High temperature
C. High pressure
D. Low pressure
Answer:
high pressure I think. answer d
Answer: C. High Pressure
Carboxyl phosphate (aka carbonyl phosphate) is the substrate that reacts with biotin to form the carboxylated biotin intermediate.
a. True
b. Fals
Answer:
TRUE ( A )
Explanation:
Biotin is a coenzyme that reacts with carboxylase enzymes like Carboxyl phosphate in the formation of carboxylated biotin intermediate
Biotin is also an important for sensitive metabolic pathways ( example ; fatty acid synthesis and amino acid catabolism )
Which are examples of harmful mutations? Check all that apply.
one that causes a person to have a light patch of hair color
one that changes a mouse’s eye shape but not its eyesight
one that allows a moth to blend into its environment
one that reduces a bean plant’s ability to make food
one that increases the plants susceptibility to disease
Answer:
one that increases the plants susceptibility to disease
Explanation:
i think
Answer:
Which are examples of harmful mutations? Check all that apply.
one that causes a person to have a light patch of hair color
one that changes a mouse’s eye shape but not its eyesight
one that allows a moth to blend into its environment
one that reduces a bean plant’s ability to make food
one that increases the plants susceptibility to disease
THE ANSWERS ARE 2 , 4 , 5
Explanation:
Answer true or false.
1._____The central nervous system consists of the brain, spinal cord, and nerves.
2._____The autonomic system is part of the nervous system that controls involuntary
actions in the body.
3._____A fish has a more highly developed brain than an ape.
4.______The spinal cord is part of the respiratory system.
5._____The three main parts of the brain in vertebrates are the cerebrum, the
cerebellum, and the brain stem.
Answer:
1. False
2. -----
3. False
4. False
5. True
I'm not sure of the 2nd question
Hope it helps:)
Which of the following are differences between DNA and RNA? Mark all that apply.
a- DNA nucleotides include: Adenine, Cytosine, Guanine and Thymine
b- RNA nucleotides include: Adenine, Cytosine, Guanine and Uracil
c- DNA normally exists as double stranded
d- RNA normally exists as single stranded
e- RNA normally exists as double stranded
f- DNA normally exists as single stranded
g- The sugar in DNA is a ribose
h- The sugar in RNA is a deoxyribose
Answer:
The correct answer is - a, b, c, d, g and h.
Explanation:
DNA and RNA both are nucleic acids and have considered genetic materials. There are certain difference in these molecules such as-
Different sugars present in the nucleotide, Deoxyribose sugar in DNA and ribose sugar in RNA.
There are different nitrogenous bases also present as RNA has uracil instead of thymine.
DNA normally found in double-stranded while RNA exists in single-stranded.
What would you say is the most significant result of the technology revolution in archaeology ?
Answer:
Improvement of preservation techniques.
Explanation:
The most significant result of the technology revolution in archaeology is the improvement of preservation techniques used for archaeological sites. Modern technology also allows researchers to go to a site in order to find out the answers of additional questions. Modern archaeologists are fighting climate change, discovering how cultures evolved with the passage of time, and using technology to better understand human evolution.
16. Which type of epithelium is found in uterine tubes(oviducts)?
The number of organisms that an area of land can sustain over a long period time is known as
Answer:
Carrying Capacity
Explanation:
What are the two forces that must balance out to maintain a state of isostasy?
Answer:
Isostasy is the rising or settling of a portion of the Earth's lithosphere that occurs when weight is removed or added in order to maintain equilibrium between buoyancy forces that push the lithosphere upward, and gravity forces that pull the lithosphere downward.
Explanation:
what are two characteristics of fluids
Answer:
-Viscosity
-the absence of shape memory
✦ ✦ ✦ Beep Boop - Blu Bot! At Your Service! Scanning Question . . .
Code: Green! Letters and Variables Received! ✦ ✦ ✦
--------------------------------------------------------------------------------------------------------------Question: What are two characteristics of fluids?
--------------------------------------------------------------------------------------------------------------Answer: Let's use body fluids for example.
1. Fluids can be either liquids or gases. Gas is easy to compress and expands to fill its container while the liquid is hard to compress.
2. Blood and Lymph are the two main body fluids.
-------------------------------------------------------------------------------------------------------------
How is the nitrogen cycle important to humans?
O It produces free nitrogen that humans can breathe.
O It converts nitrogen into a form that humans can obtain by eating other organisms.
o It produces nitrogen compounds that humang can breathe.
O It converts nitrogen into a form that humans can obtain by absorbing it through their skin.
Answer:
It converts nitrogen into a form that humans can obtain by eating other organisms.
What is the energy source used for muscle contraction?
1. Melting ice caps can result in _____.
A. a fall in sea level
B. colder temperatures
C. a rise in sea level
D. less precipitation
Answer:
C
Explanation:
if the ice caps melt it produces more water which leads to sea levels rising
Answer:
C. a rise in sea level
(depending on your stance more than one of these could be true but I'm assuming it wants the obvious one.)
how many hydrogen atoms are contained in a singleolecule of sucrose A, 6 B,12 C,22 D,24
Answer:
C 22
Explanation:
ONE FOOD CHAIN that was affected by the introduction of wolves and model it
Answer:
Carnivorous
Explanation:
The wolf, also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, and gray wolves, as colloquially understood, comprise non-domestic/feral subspecies. Wikipedia