Answers
Meiosis is for sexual reproduction and is meant to create diversity. Answers A/e involve identical-ness, so they are wrong.
Answer:
the purpose of meiosis is to produce gametes, the sperm and eggs, with half of the genetic complement of the parent cells. (b, c, d)
Explanation:
pls do brainliest
Related Questions
- always expressed when one or two alleles are present
- only expressed when two alleles are preset
Answers
Answer:
A dominant phenotype will be expressed when at least one allele of its associated type is present, whereas a recessive phenotype will only be expressed when both alleles are of its associated type. However, there are exceptions to the way heterozygotes express themselves in the phenotype.
Explanation:
Please match the vocab terms
Answers
Sex chromosomes.
Genes.
New alleles.
Mitosis.
Cells from a male and female that may result in an offspring.
Genome.
Mitosis.
Chromosomes.
Gene duplication or gene mutation.
Meiosis.
Offspring.
Stem cells.
Metaphase.
Where do substrates bind on an enzyme?
active site
surface receptor
voltage-gated
channels
calcium channels
Answers
Penicillium (the source of the antibiotic penicillin) is a mold that secretes a toxin that kills bacteria and other organisms. Penicillium, however, is not harmed by this toxin. This is an example of:
Answers
Answer:
This is an example of a mentalism (Option d).
Hope this is correct have a great day
Brainly please
mRNA has 1500 bases. If all of them are used for coding amino acids, the number of amino acids in polypeptides will be ?
Answers
Answer:
499
Explanation:
You are studying ion channels and have set up model lipid vesicles containing the three following transporters:
1. a Na+ /H+ antiporter driven by the Na+ concentration gradient.
2. The common 3Na+ /2K+ pump.
3. K+ leak channels. The experiments are designed such that all three transporters are oriented in the model lipid bilayers in the same direction they would be in the plasma membrane of a cell and that concentration gradients in vitro mimic the concentration gradients experienced by cells (e.g., the extracellular Na+ concentration is similar to the concentration outside of the vesicle whereas the concentration in the lumen of the model vesicles is similar to intracellular Na+ levels).
Required:
a. Draw the arrangement and ion flow of the three types of transporters in the model membranes.
b. What do you predict will happen to the pH of the vesicle lumen if you treat the model membranes with the drug oubain that impairs function of the 3Na+/2K+ pump? Briefly explain your answer in terms of what happens with each transporter.
Answers
Answer and Explanation:
a) you will find the arrangement and ion flow of the three types of transporters in the model membranes in the attached files.
K+ leak channels are channel proteins that allow K⁺ to leave the cell in favor of its concentration gradient. It keeps a stable equilibrium by taking out K⁺ that the 3Na+ /2K+ pump brings into the cell. Any alteration in the pump leads to an alteration in the leak channel functioning. Na+ /H+ antiporter is an integral membrane protein, and a secondary transporter is responsible for the interchange of H+ and Na+ through the membrane with no use of energy. It regulates pH within the cell. It responds to the Na+ and H+ concentration gradient, determined by the 3Na+ /2K+ pump. An alteration in the pump functioning produces a change in the Na gradient and consequently affects the antiporter interchange action. 3Na+ /2K+ pump is an integral protein that transports K+ and Na+ against the electrochemical gradient. A significant amount of energy is used to make the pump function. It brings K+ into the cell and takes Na+ out of it. It keeps the membrane potential and the electrochemical gradient constant. The pump function is associated with the leak channels and the antiporters function.Under normal conditions, the cell interior has a lower pH than the exterior. The K+ concentration is higher in the interior, while the Na+ concentration is higher in the cell exterior. The interior of the cell is always more electronegative than the cell exterior.
b)
The drug ouabain inhibits the pump. It impedes the Na+ exit and the K+ entrance. It occurs a sharp increase in the Na+ intracellular concentration, which influences the Na+ /H+ antiporter that changes the ions´ direction, taking out Na+ and bringing in H+ to compensate the intracellular Na+ excess. There is also a decrease in the leak channel function, which does not allow K+ to leave the cell.
Whenever the pump is inhibited, there is an increase in the intracellular pH, because Na+ concentration increases in the interior.
Question 1 (1 point)
Tubelike cells that carry food from the leaves to other parts of the plant are called?
Question 1 options:
Xlyem
Phloem
Choloropasts
Question 2 (1 point)
Liverworts are non vascular plants and grow?
Question 2 options:
On tree tops
Flat and close to the ground
Tall like trees
Question 3 (1 point)
Structures that anchor vascular plants and take in water and minerals are?
Question 3 options:
stems
leaves
roots
flowers
Question 4 (1 point)
Which of the following is not true of mosses, liverworts, and hornworts?
Question 4 options:
They are non-vascular plants.
They have true roots, stems, and leaves
They grow in moist places.
They are small and low-growing.
Question 5 (1 point)
Which is the best explanation of water transport in a non-vascular plant like the one shown below?
Question 5 options:
Water moves only in the roots.
Water moves from cell to cell.
Water moves through a system of tubes.
Water moves directly to the flowers from the roots.
Question 6 (1 point)
Looking at the diagram above. What is the function of the anther?
Question 6 options:
catches the sticky pollen
produces the pollen
becomes the fruit
passage tube for pollen
Answers
Answer:
1) xlyem
2) flat and close to the ground
3) roots
4) they have true roots, stems, and leaves
5) water moves from cell to cell
6) produces pollen
Explanation:
The answers to the following questions are as follow:
1) xylem
2) flat and close to the ground
3) roots
4) they have true roots, stems, and leaves
5) water moves from cell to cell
6) produces pollen
What are vascular plants?Vascular plants are a group of plants that have specialized tissues for conducting water, minerals, and nutrients throughout the plant. These specialized tissues, called vascular tissue, consist of xylem and phloem.
Xylem is a type of vascular tissue that is responsible for transporting water and minerals from the roots to the rest of the plant. It consists of tubes made of dead cells with thick cell walls that form a continuous network throughout the plant.
Phloem is another type of vascular tissue that is responsible for transporting sugars and other nutrients throughout the plant. It consists of tubes made of living cells that are arranged in a circular pattern around the xylem.
Vascular plants are important because they are able to grow to larger sizes than non-vascular plants due to their ability to transport water and nutrients throughout the plant. Examples of vascular plants include trees, grasses, and flowers.
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How do organisms obtain energy from an ecosystem?
Answers
Answer:
Plants obtain food by photosynthesising
Herbivores obtain food by eating plants
Carnivores obtain food by eating an animal
How did scientists determine that gorillas are closely related to humans?
Answers
Explanation:
Tubelike cells that carry food from the leaves to other parts of the plant are called?
Question 1 options:
Xylem
Phloem
Chloroplasts
Answers
Answer: Phloem carry food from the leaves to other parts of the plant
Explanation: Xylem carry water and Chloroplasts are organelles in cells wich allow the plant to photosynthesise
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A scientist finds a tiny fragment of a bone too small to be classified by its appearance. The scientist studies the tiny fragment and concludes that it belonged to an ancient primate species. How was the scientist able to classify the bone?
Answers
Answer:
Through a microscope.
Explanation:
A stereozoom microscope is a handy instrument for magnifying small features on the surface of a bone.
Answer:
Through a microscope
Explanation:
I just know
Cells can be prokaryotic or eukaryotic. Which of the following structures is present in eukaryotic cells but not in prokaryotic cells?
Answers
Answer:
nucleus
Explanation:
eukaryotic has a nucleus, prokaryotic does not
what type of symbiotic relationship is between the anémone and the clow fish?
A.Commensalism
B.Paratism
C.Predation
D.Mutualism
Answers
The answer is D. Mutualism
app app
[tex] \geqslant a[/tex]
Answers
Answer:
what?
Explanation:
When fruits or vegetables are left exposed to the air after they have been boiled, they don't turn brown. How can you explain this?
Answers
Answer:
I guess cuz u didn't use direct heat with fire, just hot water
Explanation:
Over a six-year period, a biologist has collected data about the physical characteristics, behavior, feeding habits and mating rituals of four bird species living in a South American rainforest. At the end of the six-year period, the biologist claims that evidence of evolution is present in two of the four species. Which of the following is most likely to occur when the biologist presents these findings to other scientists?
Answers
Answer:
C Scientists will debate and seek confirmation through additional research prior to accepting the findings as fact.
Explanation:
When a biologist presents evidence of evolution in two of four bird species living in a South American rainforest, it is likely that other scientists will engage in a critical evaluation of the data and conclusions.
What is the importance of evidence?Scientists may ask questions about the methods used to collect and analyze the data, and may also examine the data themselves to determine the validity of the conclusions. They may also compare the data with other studies and consider alternative explanations for the observed changes in the two species.
Ultimately, the goal of this process is to determine whether the evidence supports the conclusions about evolution in the two bird species. If the evidence is found to be sound and the conclusions are supported, the findings may be published in a scientific journal and become part of the scientific literature. However, if the evidence is not robust or the conclusions are not supported, the findings may be revised or rejected.
In conclusion, the presentation of the findings is likely to lead to a critical evaluation and scientific discussion among other biologists, which can help to establish the validity of the evidence and conclusions about evolution in the two bird species.
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Mutation in the hemoglobin gene can cause sickle-cell anemia. The defective protein found in sickle-cell anemia causes red blood cells to “sickle”—become a misshapen C shape. These misshapen cells abnormally stick to each other and can become trapped by leukocytes (white blood cells) that are rolling or paused on the endothelial cells lining the vessel. This causes blockages of small blood vessels, causing severe pain and strokes called vaso-occlusive crisis. A new drug that binds and blocks selectin proteins is in phase III clinical trials to test for improvement in patients' symptoms. Why might this be an effective treatment for vaso-occlusive crisis?
Answers
what are the two phases of the respiratory movement of man? Are they the same in a grasshopper or a fish?
Answers
The phases of the respiratory movement of men is the same in fish because they also inhale and exhale just like us expect for their fish of course.
The two phases of the respiratory movement of man is inspiration ( or inhalation) and expiration (or exhalation). The phases of the respiratory movement of men is the same in fish because they also inhale and exhale.
What is inspiration (inhalation ) ?
Inspiration (inhalation) is the process of taking air into the lungs. It is the active phase of ventilation because it is the result of muscle contraction.
What is expiration (exhalation)?
Expiration (exhalation) is the process of letting air out of the lungs during the breathing cycle.
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The unit of measurement for forces is called
Answers
Answer:
I am pretty sure its called a Newton=unit of force
In Journey to the Center of the Earth, by Jules Verne, an adventurer travels through the layers of Earth until he reaches the center. While it is not possible to actually travel through all of the layers of Earth, in what order would the adventurer have traveled to reach the center? Write the layers (outer core, mantle, inner core, crust) in the correct order from outermost to innermost layer.
Answers
Answer:
The correct answer would be - crust, mantle, outermost and innermost layer.
Explanation:
It is not possible to travel through all of the layers of Earth, however, Hypothetically, if an individual takes a journey of traveling to the core of the Earth, he needs to go through total five total layers, including the "center of the Earth" as described in Jules Verne's novel.
The crust is the first and outermost layer of the earth from the top of the earth's surface. It is the layer we and all geographical areas such as caves present. The second layer is the mantle that can be distinguished in the upper mantle is the primary mantle itself. After the mantle person would enter the outer core and then the final layer is the inner core.
In rats, the genes B and D control fur color as follows: B_dd rats have black fur, bbD_ have yellow fur, B_D_ have brown fur, and bbdd rats have cream-colored fur. If a pure-breeding brown rat and a pure-breeding cream-colored rat mate to produce an F1, and F1 are allowed to interbreed to produce an F2, what is the expected phenotypic distribution of the brown fur color rat offspring
Answers
Answer:
Phenotypes:
9/16 Brown-fured rats, B-D- 3/16 Black-fured rats, B-dd 3/16 Yellow-fured rats, bbD- 1/16 Cream-fured rats, bbddExplanation:
Available data:
the genes B and D control fur color B_dd rats have black fur, bbD_ have yellow fur, B_D_ have brown fur, bbdd rats have cream-colored fur1st cross: pure-breeding brown rat with a pure-breeding cream-colored rat
Parentals) BBDD x bbdd
Gametes) BD, BD, BD, BD
bd, bd, bd, bd
F1) 100% BbDd
2nd Cross: F1 individuals interbreed
Parentals) BbDd x BbDd
Gametes) BD, Bd, bD, bd
BD, Bd, bD, bd
Punnett square) BD Bd bD bd
BD BBDD BBDd BbDD BbDd
Bd BBDd BBdd BbDd Bbdd
bD BbDD BbDd bbDD bbDd
bd BbDd Bbdd bbDd bbdd
F2) Genotypes:
1/16 BBDD 2/16 BBDd 1/16 BBdd 2/16 BbDD 4/16 BbDd 2/16 Bbdd 1/16 bbDD 2/16 bbDd 1/16 bbddPhenotypes:
9/16 Brown-fured rats, B-D- 3/16 Black-fured rats, B-dd 3/16 Yellow-fured rats, bbD- 1/16 Cream-fured rats, bbddWhich best compares self-renewal and differentiation?
Answers
Answer:
Only differentiation creates more of the same types of cells. ... Only self-renewal creates more of the same types of cells. Only self-renewal depends on gene expression
Answer:
Only differentiation creates more of the same types of cells. ... Only self-renewal creates more of the same types of cells. Only self-renewal depends on gene expression.
Explanation:
please give me brain list and follow
Describe the movement of the dominoes as energy is transferred through them and then compare the movement of longitudinal waves to the movement of the dominoes. Record your evidence.
Answers
Answer:
The waves move outwards from where the rock hit. When the waves pass the wood, it bobs up and down. In the case of the falling dominoes, the movement of the dominoes was in the direction parallel to the movement of the wave, longitudinal.
Explanation:
Hope this helps :D
2. What does proper disposal of hazardous waste prevent?
Answers
The organelle that is the site of cellular respiration is the
o mitochondrion
O nucleus
o chloroplast
o ribosome
Answers
Answer:
hope this helps
Explanation:
mitochondrion
Answer:
mitochondrion
Explanation:
Plz mark brainliest thanks
Which of these BEST describes the relationship between the atmosphere and hydrosphere? A) the atmosphere and hydrosphere have no relationship B) the hydrosphere grows due to the formation of volcanoes 9 the solid layer of the hydrosphere is located in the atmosphere D) evaporation brings water into the atmosphere and condensation brings it back to the hydrosphere
Answers
The BEST description of the relationship between the atmosphere and the hydrosphere is D). Evaporation brings water into the atmosphere, and condensation brings it back to the hydrosphere.
To learn more about this relationship, let us look at their meanings.
What is the atmosphere?
The atmosphere is the thin layer of the Earth's air. The atmosphere has various gases, including oxygen, nitrogen, carbon dioxides, dust particles, and water vapor. These gases absorb and emit radiation, thereby controlling the Earth's temperature.
What is the hydrosphere?
The hydrosphere refers to the mass of water on, under, and above the surface of the Earth. The hydrosphere includes water vapor, which controls the Earth's temperature.
Thus, the interaction of the atmosphere and hydrosphere creates the Earth's climate through evaporation and condensation of gases.
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Which of the following statements concerning the Minnesota Twin Study is not true?
The Minnesota Twin Study revealed that the "Jim twins" had uncommon similarities even though they were raised apart.
The Minnesota Twin Study focused on comparing the personalities of fraternal twins with identical twins.
The Minnesota Twin Study found that identical twins were less similar in personality than fraternal twins.
The Minnesota Twin Study has helped established support for the claim that heredity influences personality.
Answers
Answer:
C: The Minnesota Twin Study found that identical twins were less similar in personality than fraternal twins
Explanation:
The Minnesota Twin Study found that identical twins were less similar in personality than fraternal twins is a statement that is not true concerning the Minnesota Twin. Thus, the correct option is C.
What do you mean by Minnesota twins?Minnesota twins may be defined as a situation of giving birth to the individuals whose names are adopted after the two upper midwest cities.
It was the time when the president of Washington Senators Calvin Griffith made a historical decision of dragging his club to a new location.
Therefore, the correct option for this question is C.
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Poiseille's law is often used to calculated the arteriolar blood flow. According the this law, the following all affect blood flow:-radius of vessel-length of vessel-viscosity of blood-pressure gradientWhich of these has the GREATEST affect on blood flow?
Answers
Answer:
a. radius of vessel
Question 5 of 10
Pls Help
This strangler fig tree is growing on another tree. It will
eventually grow taller than the older tree and may kill it.
Which resource are these two trees most likely competing for?
A. Oxygen
B. Minerals
C. Sunlight
D. Water
Answers
Answer:
C. sunlight cuz i don't know. MAybe my braincells just like that
Answer:
The answer is C. Here is proof.
Explanation:
Imprinting is a type of _______ behavior.
A.inherited
B.learned
C.reflex
D.instinct
Answers
Answer:
I think it is Learned
Explanation:
Hope this helps