Explanation:
Cellular respiration and photosynthesis are two important physiological processes which formed the basis of life on Earth.
Evolutionary studies have shown that process of photosynthesis evolved earlier in organisms which led to the production of oxygen. This led to the formation of aerobic cellular respiration in organisms.
In the given, a world devoid of the plant is not possible because the plants perform the role of primary producers that is they utilize the available carbon dioxide and water and form the first stable energy molecule called glucose.
This glucose is broken down by the process of cellular respiration to further usable form. These two processes maintain the flow of energy on Earth.
Thus, without these two processes, the fictional world will not be possible.
the frequency of down syndrom increase with
the age of parents ?
Answer:
See below
Explanation:
Researchers found that the rate of Down syndrome among parents over 40 was 60 per 10,000 births, which is six times higher than the rate found among couples under 35 years old.
In a few generations, this population of beetles changed.
After few generations
Which is the most likely explanation for the change?
Answer:
https://brainly.com/question/1852726#:~:text=Answer%20Expert%20Verified&text=The%20right%20answer%20is%20D,(also%20called%20genetic%20diversity).
Explanation:
Choices:
The beetle population moved to a greener habitat.
A natural disaster almost caused the extinction of the population.
The beetle population’s food sources decreased dramatically.
A mutation resulted in a new color of insect.
Answer: A
The beetle population moved to a greener habitat.Cant Be D Did test
When carbohydrates are digested, the monomer is/are_.
•amino acid
•fats and oils
•nucleotides
• sugars
The sum of the Genetic traits in a population is called its
Answer and Explanation:
The gene pool is the sum of all the alleles in a population. Sometimes, allele frequencies within a population change randomly with no advantage to the population over existing allele frequencies. This phenomenon is called genetic drift.
Answer:
gene pool
Explanation:
whas the complimentey DNA strand for the folloing DNA sequence AATTCGGGGTTT
Answer:
DNA: TTAAGCCCCAAA
RNA: UUAAGCCCCAAA
Explanation:
A binds with T (Apples on Trees)
C binds with G (Cows eat Grass)
So complementary sequence would be TTAAGCCCCAAA
For RNA sequence:
For RNA:
A binds with U
T binds with A
C binds with G
So RNA complementary will be UUAAGCCCCAAA
Which best describes homeostasis
what is the answer
pls help do not be rude
answer number 5
thx pick one answer
Answer:
The invisible path the earth takes around the sun is called an orbit. all planets have orbits at varying speeds and some are even elliptical.
hope this helps!!
Which of the following is not a method of heat transfer? Conduction Insulation Radiation Convection
Answer:
insulation is the correct answer
The method that is not one of the heat transfer method is insulation.
Heat transfer can be regarded a term in thermal engineering use to describe the generation as well as the use and conversion, exchange of thermal energy that exist between physical systems. Heat transfer can be done with different mechanismsThese are: conductionconvectionRadiationConvection can be regarded as the flow of heat in fluids, these fluids could be warmed gas, water.Conduction can be regarded as the movement of heat through objects that are in physical contact, like two metalsRadiation can be regarded as the energy which appears from a source then travels through space, this do contain wave-like properties. Insulation can be regarded as setting up a barrier between two objects, usually between hot and the cold object , so that heat reduction can be achieved.Therefore, Insulation is not heat transfer mechanism, it i a way to reduce heat loss.
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Two solutions are separated by a semipermeable membrane that is permeable to potassium but not chloride or sodium ions. Solution A on the left contains a solution that is 100 mM potassium, while Solution B on the right has a concentration of potassium chloride of 1 mM. There is an electrode in both solutions, and a comparative assessment of voltages between the two compartments is being made. The investigator doing the study decides to call side B ground potential (or, in other words, defines it as 0).
A. What is the value for the chloride equilibrium potential in this condition?
B. In one sentence, describe why it has a positive or negative value. C. What would be the value of the chloride equilibrium potential? (show how you calculate this) D. What is the voltage of side B relative to side A? E. Does the chloride equilibrium potential contribute significantly to the voltage actually being measured by the investigator? Why or why not (one sentence)?
Which of the following factors might cause checkpoint genes to interrupt cell division? Check all that apply. Neurological signals sent from fear responses in an organism tell the cell to stop. The cell's DNA has been damaged somehow. The cell's DNA was replicated incorrectly.
Answer:
Neurological signals sent from fear responses in an organism tell the cell to stop. The cell's DNA has been damaged somehow. The cell's DNA was replicated incorrectly.
Explanation:
All the three options given can cause checkpoint genes to interrupt cell division.
Checkpoint genes are transcription genes that control cell cycle and sense defects during cells processes like DNA replication, segregation e.t.c and create response till the defects is repaired in the DNA. The important of checkpoint is that it ensure enough nutrients are available to support for division, ensure that the DNA has not been damaged, ensure that cells DNA is copied correctly and make sure cells have enough RNA for their protein synthesis.
Checkpoints genes can interrupt cell division if the dna is damaged, Dna is copied incorrectly and neurological signal sent from fear responses in an organisms tell the cells to stop.
Answer:
The cells DNA has been damaged somehow and The cells DNA was replicated incorrectly
Explanation:
sometimes, these checkpoint genes are mutated or damaged and, thus, are unable to tell a damaged cell to stop dividing. When this occurs, the damaged cell gives rise to many damaged cells, which in turn create more damaged cells. These dividing cells form a NEOPLASM
During exercise, sensory receptors detect changes in oxygen and carbon dioxide levels in the blood. This information is then sent to the brain's medulla, which causes the heart to beat faster and increases the rate of breathing. Exercising also causes the nervous system to signal the pancreas and thyroid gland to release hormones which regulate metabolism. Which statement is best demonstrated by this scenario? A. Hormones act as signal molecules between all body systems. B. Increased heart rate and blood flow decrease oxygen supply. C. Exercise is important for the body to function properly. D. Nerves transmit and respond to every major system in the body.
Answer:
Exercise is very important for the body to function properly.
Nerves transmit and respond to every major system in the body.
A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N. If both children are of blood type M, list all of the possible parental phenotypes
Answer:type A
Explanation:
Possible parental phenotypes could be mother with blood type A Rh positive and MN or MM while the father will have blood type B Rh negative and MN or MM type.
What is blood typing in humans?Blood typing is a method to tell what type of blood group or blood an individual has. Blood typing is done so a person can safely donate hos or her blood or receive a blood transfusion from another person. It is also done to see if a person have a substance called as the Rh factor on the surface of the red blood cells.
Blood typing in humans is an example of codominance and multiple allelism. Blood group A and B are codominant and O is recessive allele. Rh negative is recessive over Rh positive blood group. A third gene for the MN blood group is codominant, in which M and N are codominant.
In the given question, both the children are of blood type M. In this case, M and N are codominant over each. Therefore, the possible parental combinations can be MN × MN or MM × MN.
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Which of the following hormones is synthesized in hypothalmus and secreted from pitutary? Vasopressi or adrenocorticotropic hormones
Answer:
Vasopressin
It is synthesized in the hypothalamus and then secreted by the posterior lobe of pituitary gland
Assume that plant weight is determined by a pair of alleles at each of two independently assorting loci (A and a, B and b) that are additive in their effects. Further assume that each allele represented by an uppercase letter contributes 4 g to weight and that each allele represented by a lowercase letter contributes 1 g to weight. If a plant with genotype AA BB is crossed with a plant with genotype aa bb, what weights are expected in the F, progeny?
a.1g
b. 4g
c. 8g
d. 10g
e. 16g
Answer:
10g
Explanation:
A cross between genotype AA BB is crossed with a plant with genotype aa bb will produce
Parent genotype:AABB x aabb
Gametes: AB x ab
F1 generation - AaBb
Since an uppercase letter contributes 4 g to weight and each allele represented by a lowercase letter contributes 1 g to weight.
Thus, 4+1 + 4 + 1 = 10g
What peritoneal fold that connects the liver to the stomach
Which natural resource is formed from the deposition of sedimentary rocks?
The answeris Coal to this answer
Hopes this helps
During cell division, it is essential that the genetic material be distributed equally to the two daughter cells. This is accomplished through the participation of which one of the following organelles?
1. Centrioles
2. Rinosomes
3. Peroxisomes
4. Golgi apparatus
5. Nucleolus
Answer:
1. Centrioles
Explanation:
Centrioles are the main organelles in cellular division as they are responsible for making mitotic spindle fibers (which attach to kinetichore on chromosomes) and separate the sister chromatids (so that genetic material can be distributed equally to the two daughter cell)
An unfertilized egg cell has six chromosomes. After fertilization, how many chromosomes should the zygote have?
Answer:
12 chromosomes, because the basic (haploid) number of chromosomes is 6 (n: 6)
Explanation:
The unfertilized egg contains a basic (haploid) number of chromosomes (n), being in this case 6. In humans, for example, the gamete haploid cells have a basic n content of 23 chromosomes, while in somatic cells this DNA amount is duplicated (2n), being therefore 46 chromosomes that are organized into 22 pairs of autosomal chromosomes and two sex chromosomes (X and Y).
Identical twins are produced from the same sperm and egg (which splits after the first mitotic division), whereas fraternal twins are produced from separate sperm and separate egg cells. If two parents, one with brown eyes (a dominant trait) and the other with blue eyes (the recessive trait) produce one twin boy with blue eyes, what is the probability that a fraternal twin will transmit the blue eye allele to his or her offspring
Answer:
This is 25%
Explanation:
Analysis, Since the dominant brown eyed parents produce blue eye child, this shows they are heterozygote dominant
However,this fraternal twin is not genetically identical, due to the blue eye color,(recessive) but the fact remain that they are the parents.(because he inherited the recessive allele from each of the parent)Therefore the probability is 25%.
This is because he is the only one out of the 4 kids( based on Mendelian fashion) this is 1/4,25%
Fraternal tweens are produced from different maternal and paternal gametes. The blue-eyed tween has 100% probability of transmitting the blue-eyes allele to the offspring, while the brown-eyed tween has 50% probability.
Available data:Fraternal twins are produced from separate sperm and separate egg cells.Brown eyes ⇒ Dominant traitBlue eyes ⇒ Recessive traitWe will name B to the dominant allele that codes for brown, and b to the recessive allele that codes for blue eyes.
So, the possible genotypes and phenotypes are
Gentoype Phenotype
BB Brown eyes
Bb Brown eyes
bb Blue eyes
Solving the problemThe parent with blue eyes must be only bbThe parent with brown eyes must be either BB or BbFor the twin boy to have blue eyes, he must have received two recessive alleles, one from the mother and one from the father.
So the father is heter0zyg0us for brown eyes, Bb.
Cross: Bb x bb
F1) 1/2 of the progeny is expected to be brown-eyed, Bb
1/2 of the progeny is expected to be blue-eyed, bb.
So we have two genotypes for the tweens, Bb and bb.
bbThe bb tween has blue eyes and is h0m0zyg0us recessive for the trait. So the probability that this fraternal twin will transmit the blue eye allele to his or her offspring is 100% This tween can only provide recessive alleles to his or her progeny. BbThe Bb tween has brown eyes and is heter0zyg0us for the trait. So the probability that this fraternal twin will transmit the blue eye allele to his or her offspring is 50% This tween can provide one dominant or one recessive allele to his or her progeny.So, the blue-eyed tween has 100% probability of transmitting the blue-eyes allele to the offspring. The brown-eyed tween has 50% probability of transmitting the same allele to the descendants.
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Sleet forms from which type of precipitation?
snowflakes
ice crystals
rain droplets
Snow
I NEED TO KNOW ASAP
Answer:
rain droplets
Explanation:
Answer:
rain droplets
Explanation:
Anterior lobe of pituitary gland is
Answer:
The anterior lobe makes up about 80% of the pituitary gland. It regulates growth, metabolism, and reproduction through the hormones that it produces.
Explanation:
The production of these hormones is either stimulated or inhibited by chemical messages sent from the hypothalamus to the pituitary.
Please provide a legitimate answer and provide an explanation for the question below.
Why is a supply of oxygen important for muscle contraction?
Answer:
For muscle contraction to take place oxygen is needed. ... Oxygen allows the body to convert glucose into ATP more efficiently without creating a waste product.
Cellular respiration is the process in which your muscles use oxygen to produce ATP energy. ... Whether you're exercising or not, the oxygen in your body is used to break down glucose and create the fuel for your muscles called ATP
ATP= Adenosine triphosphate
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PLEASE MARK ME BRAINLIEST.
Explanation:
somebody help me please
Answer:
1. evolution
2. variation
3. competition
4. natural selection
Explanation:
Many traditional household appliances, including clothes dryers, use an
excessive amount of electricity. One solution is to replace older appliances
with modern appliances that are more energy-efficient.
Which of the following behaviors could further refine this solution?
OA. Use the energy-efficient appliances instead of more conservative
tactics.
B. Use additional conservation tactics, like sometimes hanging
clothes outside to dry.
OC. Use energy-efficient appliances and traditional appliances at the
same time.
OD. Use the energy-efficient appliances more often than you need to.
Answer:
B. Use additional conservation tactics, like sometimes hanging
clothes outside to dry.
Explanation:
Ap3x
Using extra energy-saving techniques, such as occasionally hanging clothes outside to dry them, could improve the solution of replacing outdated equipment with newer, more energy-efficient appliances. So, the correct option is B.
What are energy-saving techniques?Energy-saving technology, commonly referred to as green technology, is innovation that enhances upon or replaces current systems in order to save energy. Technology of this kind often helps operators save money while reducing the negative effects of human interference with the environment.
Instead of leaving appliances on standby, turn off the power source to conserve the maximum energy. As you leave the house or go to bed, turn off the heater, air conditioner, and other equipment. Turn off the computer and any other devices, including printers and Wi-Fi routers, at night or while we're away.
Using extra energy-saving techniques, such as occasionally hanging clothes outside to dry them, could improve the solution of replacing outdated equipment with newer, more energy-efficient appliances.
Therefore, the correct option is B.
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It is impossible for RNA to store genetic information, because:
a. RNA does not base pair and therefore cannot be replicated.
b. enzymes cannot process genetic information in the form of RNA.
c. RNA forms complex folded structures.
d. RNA is very unstable.
e. None of the above answers is correct; RNA can store genetic information.
Answer:
a. RNA does not base pair and therefore cannot be replicated.
Make a prediction: During the first trial, you will not be able to see how many people have the disease until the end. If no students are immune, how many do you think will have the disease at the end? __________ out of 20
Answer:
all 20
Explanation:
It is impossible to know how many individuals will have the disease at the end without knowing other factors such as the condition where the subjects are being held, trial specifications and safety measures, etc. Based on the information provided, the best prediction that can be made is that all 20 subjects will have the disease. This is because since none of them are immune the disease will spread between the patients/subjects through contact or testing equipment.
Answer:
I put 17 and it didn't say it was wrong.
Explanation:
What is the smallest or most specific level of organization organization you and your neighbors all have in common
Answer:
The cell
Explanation:
The smallest or most specific level of organization that all living organisms (including myself and my neighbors) have in common is the cell.
This is in accordance with the cell theory which has three basic components, including:
1. The cell is the basic unit of life
2. All living organisms are made up cells
3. Cells arose from pre-exsiting cells.
Other levels of organisation include tissues which are group of cells specialized for a certain function, organs which are group of tissues serving similar function, and systems which are group of organs working together as a unit.
Answer:
Population
Explanation: got it right sis !
A flask containing 100ml of YNB broth was inoculated with approximately yeast cells. The flask was incubated at 37 degrees Celsius (100rpm). Samples were periodically collected and their absorbance (optical density-OD) was measured:
Using the given data (shown in photo) calculate the doubling time of this microorganism (FIRSTLY, you have to determine the exponential phase!)
Answer:
The time it takes for the yeast population to double is 1 hour.
Explanation:
Convert the OD to an approximation of the number of cells present in the broth. Do this by multiplying the OD value with 3 x 10^7.
The exponential phase of growth for the yeast cells is from
time t = 0 hours to time t = 5 hours
The molecules in the image below are able to move across the cell
membrane through channels in the membrane proteins. The cell does not use
any energy to move the molecules down the concentration gradient. What
kind of transport is the cell using?
Answer:
A
Explanation:
A science club has 16 members. How many ways can a president, a vice president, and a treasurer be selected from the members?
A 96
B. 560
OC 1,120
D. 3,360
Answer:
The answer would be D. 3,360
Explanation:
The solution is found by multiplying 16 times 15 times 14. The club has 16 members and after one role (president) is filled, there are 15 left to fill the next (vice). The same goes for the next role (treasurer). So 16 is multiplied with 15, then 14. This is more of a math question that biology btw.