Answer:
335 million years ago
Explanation:
Pangaea or Pangea ( /pænˈdʒiːə/) was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from earlier continental units approximately 335 million years ago, and began to break apart about 175 million years ago.
Which statement correctly describes how the mitochondrial uncoupling agent valinomycin inhibits oxidative phosphorylation without collapsing the proton (H+) gradient across the inner mitochondrial membrane?
a. Valinomycin carries Kt into the mitochondrial matrix, reducing the electrical component of the electrochemical gradient across the inner mitochondrial membrane.
b. Valinomycin carries Ht into the mitochondrial matrix, decreasing the mitochondrial membrane potential without generating ATP.
c. Valinomycin is a complex I inhibitor that prevents NADH oxidation and the pumping of H+ into the intermembrane space.
d. Valinomycin is an ATP synthase inhibitor that prevents H+ from moving down its concentration gradient into the matrix.
Answer:
a. Valinomycin carries Kt into the mitochondrial matrix, reducing the electrical component of the electrochemical gradient across the inner mitochondrial membrane.
Explanation:
Oxidative phosphorylation is a process by which cells generate ATP (the energy coin of the cells) by coupling an electrochemical potential gradient across the inner mitochondrial membrane created by the electron transport chain to phosphorylation of ADP. Moreover, an ionophore is a molecule that reversibly binds ions. Ionophores are often involved in the movement of ions across the cell membrane. Valinomycin is an ionophore that mediates the transport of potassium (K+) ions down a concentration gradient, which is capable of disrupting the gradient across the membrane by modifying the K+ gradient. Valinomycin binds to K+ ions and enables them to pass more rapidly across the mitochondrial inner membrane, thereby neutralizing the excess of negative charge inside the mitochondrial matrix and thus slowing ATP synthesis.
Oran fills in the table below to organize information about the gas laws.
Gas law
Gay-Lussac's
Boyle's
Charles's
Constant
1
3
5
Changing
2
4
6
In which numbered cells should he place pressure?
O 2, 4, and 5
O 1, 4, and 6
O2, 3, and 5
O 1, 3, and 6
The correct option is D.) 1, 3, and 6 because pressure is the changing factor in Gay-Lussac's Law, the constant factor in Boyle's Law, and the changing factor in Charles's Law.
Gay-Lussac's Law states that the pressure of a given quantity of gas held at constant volume is directly proportional to the Kelvin temperature which means the pressure of a gas increases as the temperature increases, and decreases as the temperature decreases.
Boyles Law states that the pressure of a gas is inversely proportional to its volume that means as the volume of a gas increases, the pressure of the gas decreases, and vice versa.
Charles's law is a basic physical law that states that the volume of a given amount of gas at a constant pressure is directly proportional to its absolute temperature. This means that when the temperature of a gas increases, its volume also increases, and vice versa.
To learn more about pressure click here https://brainly.com/question/12497098
#SPJ1
Can someone help me in this food web lab assignment.
Answer:
search the answer on guizzes or guizlet
Explanation:
it will help you
Cell Consist of chloroplast ?
Biology i will give brainliest
10 J
As you move up each trophic level 90% of the energy from the previous level is lost. That is, only 10% of the energy from the level below is recieved.
Plants - 1,000 J
Primary consumers - 100 J
Secondary Consumer - 10 J
PLS HELP
Identify the Golgi Apparatus
Answer:
D
Explanation:
It is the golgi apparatus
(I put a labeled diagram of an animal cell)
I would like a pretty fast answer, please.
Scientists once thought that life spontaneously arose from nonliving things. It took extensive experimentation and the invention of new technology to confirm the tenets that now make up the cell theory. Now, we don't even question that cells are the basic units of life and only come from preexisting cells. What technology had the biggest impact on the development of the cell theory?
A) centrifuge
B) electrophoresis
C) microscope
D) telescope
Answer:
Microscope.
Explanation:
Microscopes were extremely influential in the development of cell theory, as they allow us to see down to the level of cells and observe them. Through process of elimination, we know it cannot be a telescope (used for observing large, far away objects) or a centrifuge (separates substances based on density). Electrophoresis is moreso used for DNA, and not for the entire cells.
HELP PLEAASEEE
Which air mass is likely to form over Minneapolis and what weather conditions would it bring?
Question 5 options:
mT bringing warm moist conditions
cT bringing warm dry conditions
mP bringing cold and moist conditions
cP bringing cold and dry conditions
Answer:
mP
Explanation:
Its gives the highs and lows of each place and as you can see a cold front is approaching witch will cause cold weather.
Its gives the highs and lows of each place and as you can see a cold front is approaching witch will cause cold weather.
What is Weather conditions?The specific atmospheric conditions in a certain place are known as the local weather. Climate is the long-term, typical pattern of weather in a particular location. The definitions of weather and climate as well as how the two terms differ may be found here.
Daily weather variations can have an impact on humans, their way of life, as well as animals and their environments. Tornadoes, hurricanes, and blizzards are just a few examples of the severe weather that may disrupt and wreck havoc.
Like the weather, the climate is subject to change, but unlike the weather, significant alterations in the climate can take hundreds or even thousands of years.
Therefore, Its gives the highs and lows of each place and as you can see a cold front is approaching witch will cause cold weather.
To learn more about weather, refer to the link:
https://brainly.com/question/14426457?
#SPJ3
what is the role of diaphragm in inhalation and exhalation
A population is a collection of all the types of organisms in an area.
Please select the best answer from the choices provided
ОТ
OF
In a study of the Hopi, a Native American tribe of central Arizona, Woolf and Dukepoo (1959) found 26 albino individuals in a total population of 6000. This form of albinism is controlled by a single gene with two alleles: albinism is recessive to normal skin coloration. Calculate the expected allele frequencies and genotype frequencies if the population were in Hardy-Weinberg equilibrium. What is the allele frequency of the normal allele
Answer:
0.9342
Explanation:
The Hardy-Weinberg equation states that p² + 2pq + q² = 1,
where p is the frequency of the dominant 'normal' (n) allele and q is the frequency of the recessive 'albino' (a) allele in the population, while q² represents the frequency of the homo-zygous albino genotype (aa), p² represents the frequency of the homo-zygous normal genotype (nn) and 2pq represents the frequency of the heterozygous genotype (na).
In this case, the frequency of individuals in the population that have the genotype aa (q²) is equal to 26/6000 = 0.004333. In consequence, q is equal to √ 0.004333 = 0.0658.
Moreover, the allele frequency of the normal (n) allele p is equal to 1 - q = 1 - 0.0658 = 0.9342, so p² (nn) = (0.9342)² = 0.8727.
Finally, the frequency of the heterozygous genotype (na) is 2pq = 2 x 0.9342 x 0.0658 = 0.123.
1. When items gain energy, molecules
A. Move slower
B. Move faster
C. Move the same
Choose one correct answer.''
Answer:
B
Explanation:
More energy creates more heat and speed.
Answer:
B. Move faster is the answer of your question .
hope it is helpful to you
state two functions of muscles found in the alimentary canal of mammals
Which is not a fossil fuel
Group of answer choices
coal
nuclear
natural gas
Petroleum
Natural gas is not a fossil fuel
hope it is helpful to you
Is a plant that has the natural ability to protect itself against predation a genetically engineered organism
Answer:
No, genetically engineered organisms are engineered by humans. The plant evolved to be this way.
Explanation:
Answer:
If it's a natural ability for the plant, it's probably not genetically engineered. It depends on the plant species/fruit.
Explanation:
Predation: A biological interaction where one organism, the predator, kills and eats another organism, its prey.
Genetically Engineered Organism: An animal, plant, or microbe whose DNA has been altered using genetic engineering techniques.
In most cases with let's say a pepper plant, the plant will produce a chemical compound called capsaicin. This is what makes the peppers spicy. It really just depends on the plant we're talking about.
What do you think it is?
Answer:
all
Explanation:
because they are all connect
Red-green color blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toes and normal color vision. Her mother is normal in all respects, but her father is color blind and polydactylous. Bill is color blind and polydactylous. His mother has normal color vision and normal fingers and toes. If Bill and Martha marry, what types and proportions of children can they produce?
The following two genotypes are crossed: Aa Bb Cc X+ Xr × Aa BB cc X+Y, where a, b, and c represent alleles of autosomal genes and X+ and Xr represent X-linked alleles in an organism with XX-XY sex determination. What is the probability of obtaining genotype aa Bb Cc X+ X+ in the progeny?
Answer:
1) Children type and proportion:
• 2/16 individuals are expected to be normal girls for both traits, X⁺X⁻Pp
• 2/16 individuals are expected to be normal boys for both traits, X⁺YPp
• 2/16 individuals are expected to be girls who are normal for vision and have polydactyly, X⁺X⁻pp
• 2/16 individuals are expected to be boys who are normal for vision and have polydactyly, X⁺Ypp
• 2/16 individuals are expected to be girls who are normal for fingers and toes and have colorblindness, X⁻X⁻Pp
• 2/16 individuals are expected to be boys who are normal for fingers and toes and have colorblindness, X⁻YPp
• 2/16 individuals are expected to be girls that are color-blinded and have polydactyly, X⁻X⁻pp
• 2/16 individuals are expected to be boys that are color-blinded and have polydactyly, X⁻Ypp
2) The probability of getting genotype aa Bb Cc X+ X+ = 1/64
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Why are phytoplankton essential to aquatic life zones?
=Answer:Phytoplankton are essential to aquatic life zones because: they provide the basis of food chains. Log in for more information. Added 5/22/2016 9:52:12 AM This answer has been confirmed as correct and helpful.
Explanation:
PLEASE HELP I HAVE AN EXAM !!!
For one meiotic division all four daughter sperm cells that are produced have the wrong number of chromosomes; two cells have one extra chromosome while the other two are each missing a chromosome. During which phase of meiosis did the problem most likely occur? What is this problem called?
Answer:
Nondisjunction occurs during anaphase I of meiosis I
Explanation:
Brainliest Please?
Answer parts A, B, C, D
Photo Attached
a). a microRNA (miRNA) is a small non-coding RNA involved in transcriptional and post transcriptional regulation of gene expression. Given the mRNA molecule below, suggest an example of a complementary 10 nucleotide miRNA. circle or highlight the sequence on the mRNA template to which your miRNA will bind, give the complementary 10 nucleotide sequence and clearly label the orientation of the miRNA molecule.
mRNA region: 5’-GUAGUACUGAUGGUCCAGUACGUGCUAGGUCGCUAGUAGUUCGAUGCAGUAUUAU-3’
b). what is the consequence of this miRNA binding to the mRNA above?
c). what happens when the miRNA is not completely complementary to the mRNA it is attached to?
d). what is one theory explaining the evolution of the RNAi pathway? what important research function has RNAi served since its discovery?
Answer:
b
Explanation:
Biology, i will give brainliest
Answer:
cellular respiration
Explanation:
Which type of reproduction provides organisms with the following disadvantages? Organisms must grow until mature enough to produce sex cells. Finding a mate uses energy and takes time.
A. Asexual Reproduction
B.Sexual Reproduction
what is the purpose of mucous coating inside the stomach?
Answer:
to break down food
Explanation:
and also to absorb nutrients
Which is not a form of precipitation?
Please help ASAP
A Snow
B Fog
C Sleet
D Hail
Answer:
B: Fog
Explanation:
The four types of precipitation are snow, rain, sleet, and hail. Fog is technically a cloud.
Which of the following is
an activity that requires
the manager of a science
laboratory to have good
communication skills?
A. Analyzing the data acquired from
an experiment
B. Asking for funding from sponsors
C. Working alone in the lab
D. Understanding the legislation that
impacts the lab
Asking for funding from sponsors.
The DNA in some lung cells was damaged by the carcinogenic compounds in tobacco and apoptosis was initiated. Which of the following is the best way for the damaged lung cells to send a message to their neighboring cells that they need to increase the production of DNA repair enzymes or start apoptosis as well?
They should send signaling molecules into the bloodstream.
They should send signaling molecules through the gap junctions.
They should send signaling molecules across a small extracellular space.
They should send signaling molecules by secreting them into the local environment.
Answer:
They should send signaling molecules through the gap junctions.
Explanation:
what is sonority and examples of sonority
Answer:
the quality or fact of being sonorous.
mid vowels [e o]
high vowels (close vowels) / glides (semivowels) [i u j w] (first two are close vowels, last two are semivowels)
flaps [ɾ]
laterals [l]
Explanation:
Answer:
sonority
[ suh-nawr-i-tee, -nor- ]SHOW IPA
See synonyms for sonority on Thesaurus.com
noun, plural so·nor·i·ties.
the condition or quality of being resonant or sonorous.
Examples: The first three movements are the best; the only charm of the fourth being its sonority, for the musical contents are poor
It does not possess the rough gravity of the Spanish, and has too few of the i's and e's that soften the sonority of the Italian.
The hymn began to repeat itself, the individual words lost in the sonority of the hall.
From the phonetic point of view we may think of words and groups of words as consisting of a series of sounds of varying sonority.
We may indicate the sonority very roughly by lines; if we connect their top ends, we shall obtain a curve.
In which of the following scenarios does skin help to maintain body temperature?
O When jumping into cold water, one's skin releases body heat into the water.
O While walking during a hot summer day, sweat on the skin evaporates and cools the body.
O After accidentally touching a hot cookie sheet, a blister forms on one's finger where all the heat entered the body.
After a long run, an Olympic athlete stretches out her arms and legs.
Answer:
B
Explanation:
While walking during a hot summer day, sweat on the skin evaporates and cools the body.
Please help.What would you expect to occur if you were to repeatedly lift 25 pounds over your head for 1 minute,
rest for 1 minute, and then repeat the exercise? Why do you expect this outcome?
Answer:
Strengthen the arms.
Explanation:
If a person repeatedly lift 25 pounds of weight over the head for 1 minute and then rest for 1 minute, the outcome of this exercise is to strengthen the muscles of the arms. The lifting of weight with the help of arms, the muscles of the arms will get stronger and increase occurs in the width of the arms. This exercise done by bodybuilders to get their arms stronger as well as athlete for stronger arms and hand muscles so the outcome of lifting the weight will leads to the increase in the strength of the arms.
What are the inputs and outputs of the respiratory system?
I think its oxygen and carbon dioxide, but im not totally sure. Thank you! AND NO LINKS PLEASE
Answer:
oxygen and carbon dioxide