Answers
Explanation:
A.
The transpiration stream that passes through a plant may follow an apoplastic route, with low resistance to flow, or a cell-to-cell route, in which cellular membranes impede water flow. However, passage of water through membranes can be facilitated by aquaporins thereby decreasing resistance. We investigated the relationship between transpiration, which can be down-regulated by abscisic acid (ABA) or by high humidity, and the osmotic water permeability (Pos) of protoplasts. By using leaf protoplasts of wild-type (wt) Arabidopsis thaliana plants and of mutants that are low in ABA (aba1) or insensitive to ABA (abi1 and abi2), we found that protoplasts from aba1 and abi mutants have very low Pos values compared with those from wt plants when the plants are grown at 45% relative humidity. High values of Pos were found 3 h after the addition of ABA to the culture medium of aba1 plants; addition of ABA to abi plants did not restore the Pos to wt levels. There was no such increase in Pos when excised leaves of aba1 plants were treated with ABA. When the transpiration stream was attenuated by growing the plants at 85% relative humidity, the Pos of protoplasts from all plants (wt and mutants) was higher. We suggest that attenuation of the transpiration stream in whole plants is required for the up-regulation of the Pos of the membranes, and that this up-regulation, which does not require ABA, is mediated by the activation of aquaporins in the plasma membrane.
B.
The influence of abscisic acid (ABA) on carbon metabolism, rate of photorespiration, and the activity of the photorespiratory enzymes ribulose bisphosphate oxygenase and glycolate oxidase in 7-day-old barley seedlings (Hordeum vulgare L. var. Alfa) was investigated. Plants treated with ABA had enhanced incorporation of labeled carbon from 14CO2 into glycolic acid, glycine, and serine, while 14C incorporation into 3-phosphoglyceric acid and sugarphosphate esters was depressed. Parallel with this effect, treated plants showed a rise in activity of RuBP oxygenase and glycolic acid oxidase. The rate of photorespiration was increased twofold by ABA treatment at molar while the CO2-compensation point increased 46% and stomatal resistance increased more than twofold over control plants.
Related Questions
Explain how genetic variation and environmental factors contribute to natural selection
Answers
Explanation:
Increasing genetic variation and the environmental effects on that variation form the basis for natural selection. A species with a great deal of genetic variability is more likely to survive as a species in a changing environment than a species with limited variability.
Cystic Fibrosis is an autosomal recessive disease. A carrier male is married to a carrier female. What is the chance they will have a child with cystic fibrosis?
Answers
Answer:
If only one of you is found to be a carrier, the chance that you will have a child with CF is very low, although not completely eliminated. If you are both carriers, each pregnancy will have a 1 in 4, or 25 percent chance of being affected with cystic fibrosis.
Explanation:
hope this is helpful
Starch and glycogen are types of this macromolecule.
a. carbohydrate.
b. nucleic acid.
c. lipid.
d. protein.
Answers
There are organic compounds like: sugars, starch, cellulose and etc.
22. Why do you think the sea urchin was chosen to test the effect of changes in pH?
Answers
Answer:
as it settles deeper underwater ph tends to be higher and a sea urchin tends to be more resilient to change
Acidic seawater, at current pH levels found in the world's oceans, can have a negative impact on sea urchin larval development so it is taken to test the effect of changes in pH.
What is sea urchin?Sea urchins are spiny, globular echinoderms of the Echinoidea class. The urchins were able to compensate for internal pH in modest acidification (pH 7.8) and not in higher acidification (pH 7.6).
The pH of coelomic fluid was lower at higher temperatures.
Thus, due to this, the sea urchin was chosen to test the effect of changes in pH.
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How did science play a role in diagnosing the water problem in Flint
Answers
Answer:
Explanation:
by desolving it
Help me please it’s biology
Answers
Answer:
the last one
Explanation:
Answer:
I'm pretty sure it's a virus
Explanation:
Viruses are non-living, therefore they are abiotic
Please helpppppppp mee
Answers
and ur tab yeah man sry hdhdhhdvdvdv I am hat bb
Prokaryotic does not have...
A.) life
B.) cell membrane
C.) DNA or RNA
D.)membrane bound
F.)organelles
Answers
they have no internal membrane bound organelles
explain why cells don't just continue to grow bigger as the organisms grow bigger. Why do cells divide? Write in complete sentences
Answers
Answer:
Cells divide to make sure the organism is growing and it helps the organism get all the stuff they need to live.
Explanation:
Cells have specific dna is in these cells to help the organism grow and keep making life as we know it, multiple cells die for us living
What element has 1 valence electrons and 4 energy levels?
Answers
Answer:
Hydrogen and helium, both in the first period, have their valence electrons in the principal energy level n=1
Explanation:
Answer:
Hydrogen and Helium
Explanation:
Scientists are now studying human DNA in labs all over the world. Which are current goals for the scientists at these labs? Select three answers that apply. A. completing a full sequence of human DNA (the Human Genome Project) B. identifying the regions of human DNA that are transcribed into RNA C. identifying the regions of human DNA that bind to proteins D. analyzing the regions of human DNA that vary among individuals E. describing the molecular structure of human DNA
Answers
Answer:
B. identifying the regions of human DNA that are transcribed into RNA
C. identifying the regions of human DNA that bind to proteins
D. analyzing the regions of human DNA that vary among individuals
Explanation:
The double helix structure of the deoxyribonucleic acid (DNA) molecule was characterized and published in April 1953 by Francis Crick and James Watson. Moreover, the Human Genome Project was a project aimed at completing mapping and sequencing of the human genome. This project was completed and published in April 2003. Nowadays, scientists are focused on identifying which genes are expressed (i.e., transcribed into RNA) in specific cell types/tissues. For this purpose, it is imperative 1-to identify the promoter and enhancer regions that bind to specific proteins (transcription factors) in order to activate gene expression, and 2-to understand how genetic variation is related to gene expression patterns in specific cell types and/or in response to specific environmental stimuli.
Complete a Punnett square that shows a test cross for a tall pea plant (RR x rr). Place the plant to be tested at the top of the Punnett Square.
Answers
Answer:
Rr, Rr, Rr, Rr.
the pea will be heterogeneous.
Explanation:
I am pretty sure
please help, will give brainliest
Answers
Answer:
contraction and relaxation of the heart
Explanation:
11. What genetic syndrome is shown in this picture?*
Answers
Answer:
As per I know...
it's Down's syndrome..
Mitosis leads to which of the following?
A. Eggs or sperm
B. No diversity in the offspring
C. Four daughter cells
D. Cells with 23 chromosomes
Answers
I hope this helps.
Construct an argument. Do you believe it's ethical or unethical to artificially select traits in plants and or animals? Provide evidenco to suoport your claims. It doesn't matter what side you chose, but I need it asap.I will give you any mark you want.
Answers
Answer:
I believe its ethical to artificially select traits in plants.
Explanation:
This is my opinion
Answer:
I believe its ethical to artificially select traits in plants.
Explanation:
my opinion
Pls help me thx alot
Answers
Answer:
I want to say Disruptive.
Explanation:
please tell me if wrong! hope this helps!
The shape of North Carolina's Twelfth Congressional District, shown above, is most likely the result of - (A) watershed boundaries B) gerrymandering (C) county boundaries (D) decentralization (E) amalgamation
Answers
Answer:B gerrymandering
Explanation:i had this on a test
The majority of states give the state legislature main power over the process of drawing congressional and state legislative districts. Thus, option B is correct.
What gerrymandering shaped North Carolina's?The admittance of Dakota Territory as two states rather than one is a remarkable example. Regardless of its population, each new state carried a minimum of three electoral votes under the standards for representation in the Electoral College.
On February 11, 1812, the first “gerrymander” was sketched on a map and made official. The redistricting plan was approved by Elbridge Gerry, the governor of Massachusetts at the time, in order to maintain his party's hold on power in the forthcoming election.
Therefore, gerrymandering shape of North Carolina's Twelfth Congressional District.
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Which statement correctly describes blood sugar monitoring in diabetics?
Type II diabetics do not need to monitor their blood sugar.
Type I diabetics should monitor their blood sugar at least three times a day.
Gestational diabetics should monitor the blood sugar at least three times a day.
All diabetics need to monitor their blood sugar after every meal.
Answers
Answer:
Answer is 2
Explanation:
Type 1 diabetics should monitor their blood sugar at least three times a day, correctly describes blood sugar monitoring in diabetics.
I hope it's helpful!
Answer:
C)Type I diabetics should monitor their blood sugar at least three times a day.
Explanation:
please help! i’m confused
Answers
Answer:
Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.
Explanation:
A broken bone can heal itself in a few weeks
Asexual reproduction
Sexual reproduction
Answers
Answer:
Asexual reproduction
Explanation:
It is Asexual reproduction. Because of miosis and mitosis, the bone can heal by itself after a few weeks.
light pollution from a city can make the night sky appear as if ________
a. stars seem closer to us
b. stars seem farther away
c. there are more stars
d. there are no stars
( i dont know which ones science where it tells you to choose )
Answers
How does a Covalent Bond Form? ( No goo.gle ik the goo.gle answer cause i tryed looking it up if you put tht answer u wont get brainliest)
Answers
Answer:
A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions. Shared electrons located in the space between the two nuclei are called bonding electrons. The bonded pair is the “glue” that holds the atoms together in molecular units.
Answer:
A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions. Shared electrons located in the space between the two nuclei are called bonding electrons. The bonded pair is the “glue” that holds the atoms together in molecular units.
Explanation:
Please hurry it’s timed
Answers
Answer:
B) Nucleotide
Answer:
Nucleotide
Explanation:
The entire thing is called a nucleotide, the other answers are parts of a nucleotide.
In humans which of these types of cells generally do not divide after they have developed?
- skin cells
- cells of the lining of the digestive tract
- cells in the bone marrow that generate blood cells
- muscle cells and nerve cells
Answers
Muscle cells and nerve cell
Complete the flowchart to summarize cellular respiration.
Answers
Answer:
Explanation:
K
A 4 kg cannonball is accelerated through the barrel of a cannon with an acceleration of 725 m/s2. What force must have been applied to the bullet?
Answers
Answer:
2900N...........
Explanation:
f=ma
f=4×725
f=2900N
Based on the diagram above, how is isoleucine inhibiting the function of threonine deaminase (Enzyme 1)?
According to the diagram, when will this enzyme begin to function again and make more isoleucine?
Answers
Answer:
b evrensel cevap geçiş ocmc.cc,c,
Explanation:
enzim olmasi lazi, hakikatten ya
Imagine that you are a scientist who has discovered a new object. You want to find out if the object is biotic or abiotic. You observe several characteristics about the new object. Which of these characteristics would tell you that the object is abiotic, or not alive?(1 point)
The object cannot create energy.
The object has a crystalline structure.
The object can mutate.
The object responds to stimuli.
Answers
Answer:
the answer is the object cannot create energy
Explanation:
i just got it right on my quick check
The characteristic that would tell if an object is abiotic or nonliving is if the object cannot create energy.
The capacity to create energy for the normal functioning of the body is one of the key characteristics of living organisms. This energy is usually gotten from the breakdown of food materials through a process known as respiration.
Respiration could be in the presence (aerobic) or absence (anaerobic) of oxygen but the ultimate end is to generate energy, usually in the form of ATP, for metabolism.
Thus, any object that lacks the capacity to carry out respiration cannot be considered to be living or biotic.
More on the characteristics of living organisms can be found here: https://brainly.com/question/17709200
Colorblindness is a sex-linked recessive trait carried on the X chromosome. If a woman with
normal vision marries a colorblind man, which will most likely be true of their children?
PLEASE PLEASE PLEASE HELP!!!!
Answers
Answer: NO BECUZ IF DA MAN IS COLOR BLIND HIS SPEM WONT BE COLOR BLIND AND SCINCE THE GRILL AINT COLLR BLIND DEN THE BABY AINT GON BE COLLOR BLIND. YA HERD
Explanation: