Answer:
The correct answer is -
1. right-handed
2. right-handed
3. positive
4. left-handed
5. negative
6. negative
Explanation:
In a circular bacterial chromosome, the structure of DNA is a right-handed double helix In a circular bacterial chromosome.
If DNA is twisted in the right-handed direction, it becomes overwound. Overwinding results in positive supercoiling takes place. If DNA is twisted in the left handd direction, it becomes underwound. Underwinding results in negative supercoiling.
f. One effect negative supercoiling in bacterial chromosomes is to promote separation of the two strands of DNA in the double helix
You have been given three plants: Two have solid black flowers, and one has grey flowers. You cross each black-flowered plant to the grey plant with the following results:
Parents: black #1 X grey F1: 87 solid black, 83 spotted black
Parents: black #2 X grey F1: all black
To try and make sense of these results, you intercross the solid black-flowered F1 plants from cross #2 with the following results in the F2:
132 black
35 spotted black
11 grey
What are the genotypes of the parents, F1 and F2 generations?
Answer:
The correct answer would be -
F1: #1 black flower plant = Aabb and aabb and #2 = AABB and aabb
F2 = AaBb and AaBb
Explanation:
In this cross, it is the case of the dominant epistasis type of inheritance pattern as Gene A masks the expression of gene B but expresses itself only in presence of b or B.
The ratio of the dihybrid cross change in such inheritance from 9: 3: 3: 1 ratio changes to 12: 3: 1.
Check for the images for cross:
Which two elements are characteristics of autobiographies?
Autobiographies include fictional accounts of a series of events.
Autobiographies are written in the first-person point of view.
Autobiographies are told by an outside observer.
Autobiographies rely on research to tell the story.
Autobiographies share an author’s personal thoughts.
Answer:
It is b and e
Explanation:
Autobiographies are written in the first-person point of view.
Autobiographies share an author’s personal thoughts.
Answer:
The answer is B. Autobiographies are written in the first-person point of view. And E. Autobiographies share an author’s personal thoughts.
A feature of an organism
1.gene
2.mutations
3.cell
4.chromosome
5.Trait
Answer:
(Not gene)
Explanation:
I was taking a quiz and tried #1 (gene) and it said i was wrong
What is your opinion on the use of stem cells, obtained from fertilized eggs or early stage embryos
USE OF STEM CELL:
The first attempts to turn mature cells back into pluripotent stem cells involved a process called cloning. In the cloning process, an egg is fertilized in the lab, and right after fertilization, the DNA is removed from the egg.These stem cells come from embryos that are three to five days old. These are pluripotent (ploo-RIP-uh-tunt) stem cells, meaning they can divide into more stem cells or can become any type of cell in the body. This versatility allows embryonic stem cells to be used to regenerate or repair diseased tissue and organs.Despite the potential benefit of using human ES cells in the treatment of disease, their use remains controversial because of their derivation from early embryos.Learn more:
brainly.com/question/12483864
What's a chromosome
Please help I’ll give brainliest to whoever’s right
Answer:
1:Gravity acts on all masses equally, even though the effects on both masses may be different because gravity causes all objects to fall at the same constant rate of 9.8 m/s2. An object in free fall means that the only force acting on the object is gravity
2:Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
3:A scientific theory is an explanation of something in the natural world that is based on past observations and evidence.
4:In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
Explanation:
Answer this please. Its gizmos
do you guys know any good songs or good ways to remember all the bones in the body and where they are???? i have a test tomorrow for this and i cant remember any of it
Answer:
The human bones song by jam campus or how to learn the human bones video
Explanation:
What do variations of traits have to do with mutations? give an example
which of the following changes depending on changes to gravitational forces
a. velocity
b. mass
c. shape
d.weight
When plants die this causes what to increase?
Answer:
Explanation:
Improper watering is often the reason for sudden dying of plants. If you forgot to water for a few days, it's possible that the roots dried up. ... Root rot, a result of wet, poorly drained soil, can be occurring under the surface of the soil, even if the plant looks healthy.
4 points
Objects revolving around the Sun that are too small and too numerous to
be considered planets. *
Answer:
Asteroids are rocky worlds revolving around the sun that are too small to be called planets. They are also known as planetoids or minor planets. There are millions of asteroids, ranging in size from hundreds of miles to several feet across.
Which of these is an abiotic infectious agent?
● Bacteria
●Fungi
● Parasites
● Viruses
Answer:
A. Bacteria
Explanation:
Hope this helps!
Cellular Respiration occurs in which organelle?
a. ribosome
B. golgi
c.nucleus
d.mitochondria
Answer:
the answer d. mitochondria
During the New Imperialism nations expanded their empires to
Answer: To compete with one another
Explanation: pennfoster
chemical used in afb staining
Answer:
carbol fuchsin, acid alcohol, and methylene blue.
.............
Write a 5-sentence paragraph to explain how energy and work are related. Give an example of that.
1. It is a means of perpetuating the race of the species whose life span is finite.
A. Reproduction
C. Oogenesis
B. Fertilization
D. Spermatogenesis
2. It is a method of reproduction that does not invove the union of gametes.
A. Sexual Reproduction
C. Sporulation
B. Propagation
D. Asexual Reproduction
3. What do we call the process that is widely used to propagate desired varieties of trees and shrubs.
A. Grafting
C. Layering
B. Budding
D. Sporulation
4. It involves the breaking of any part of the body or the breaking up of the entire body into several
pieces.
A. Regeneration
C. Fragmentation
B. Propagation
D. Autotomy
Answer:
i have no clue
Explanation:
yes
Genetics Problem Solving Chapter 25
Answer:
See the answer below
Explanation:
1. Tt x Tt
TT Tt Tt tt
Assuming that T is dominant over t:
Genotype ratio = 1TT:2Tt:1tt
Phenotype ratio = 3:1
2. Rr x Rr
RR Rr Rr rr
Assuming that R is dominant over r:
Genotype ratio = 1RR:2Rr:1rr
Phenotype ratio = 3:1
3. Assuming that green (G) is dominant over the other color (g). Heterozygous green would be Gg
Gg x Gg
GG Gg Gg gg
Genotype ratio = 1GG:2Gg:1gg
Phenotype ratio = 3:1 (green ratio the other color)
4. Assuming that green (G) is dominant over the other color (g) as above:
homzygous green plant = GG; heterozygous green plant - Gg
GG x Gg
GG Gg GG Gg
Genotype ratio = 1GG:1Gg
Phenotype ratio = 100% green
5. Assuming that tall (T) is dominant over short (t)
Homzygous tall plant = TT
short plant = tt
TT x tt
Tt Tt Tt Tt
Genotype ratio = 100% Tt
Phenotype ratio = 100% tall
You need a dog to work with the police.What traits would you want the dog to have? Why?
what is the result of cell that undergo division by mitosis
Answer:
mitosis results in two identical daughter cells ..hope this helped!
Explanation: a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells.
What does permafrost do the the soil? (The soil in the tundra)
Answer: It makes the soil frozen and hard
Explanation: the permafrost frezzes the soil and doesnt allow any plant life to grow
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. Which of the following is a possible phenotype for the father?
A) A negative
B) O negative
C) B positive
D) AB negative
Answer:
The correct answer is - C) B positive
Explanation:
In the given question is the man has B positive blood group with two offspring a girl with type O positive and a son who is type B negative. In ABO blood group A and B if present together they express in offspring if present together.
Here the difference in the Rh factor only as the blood group O has no antigen on its surface therefore the most possible phenotype for the father as he has son with B negative and a daughter with O positive.
During photosynthesis energy from the sun is converted into
Which line of defense includes active immunity?
O first
O second
O third
O fourth
Answer:
The second line of defense.
Explanation:
In our bodies the second line of defense includes active immunity. It contains non-specific immune responses, but yet still contains specific responses for certain things such as inflammatory and fevers.
Third line of defense includes active immunity. The correct option is C.
What are lines of defense?The first line of defense consists of chemical and physical barriers that are constantly ready to defend the body against infection.
Your skin, tears, sputum, cilia, stomach acid, urine flow, 'friendly' bacteria, and white blood cells called neutrophils are examples of these.
The second line of defense assists administration in effectively managing risk and controls.
Organization develops multiple risk management and compliance functions to assist in the development and/or monitoring of first-line controls.
Immune cells that specifically target antigens are the third line of defense. B-cells and T-cells, all white blood cells, are immune cells that play a role in the third defense line.
Antibodies are produced by B-cells. T-cells aid in the identification of pathogenic cells and the destruction of those cells.
Thus, the correct option is C.
For more details regarding line of defense, visit:
https://brainly.com/question/15026334
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2. The structural and functional unit of life is (a) a cell, (b) an organ, (c) the organism, (d) a
molecule.
Answer:
A. A cell
Explanation:
Cells are the building blocks of life.
They are the biological units of organisms and are the basic structural and functional units of life.
Cells are the smallest units of life.
The distribution of the height of humans is a normal distribution. There are some very y'all people, and some very short people, but most people are in the middle. What is most likely true about this trait?
Answer:
humans normal distribution
Explanation
sorry
Which best describes independent assortment?
In metaphase 1, chromosomes from the mother and father line up on opposite sides of the cell.
In metaphase 1, chromosomes from the mother and father line up randomly along the middle of the cell.
Portions of each chromosome switch sections in the mother’s and father’s chromosomes.
Portions of each chromosome break off and reattach to the original chromosome.
Answer:
In metaphase 1, chromosomes from the mother and father line up randomly along the middle of the cell.
Explanation:
In diploid (2n) organisms, the homologous chromosomes are the two copies of each chromosome, where one of these homologs is the chromosome from the mother, while the second one is from the father. During metaphase I, the homologous pairs of chromosomes pair together at the middle of the cell. The law of independent assortment, also known as or Mendel's Second Law, states that homologous chromosomes line up in random orientations at the metaphase plate during this period (metaphase I).
Answer:
B
Explanation:
How have protozoa typically been classified?
by their type of reproduction
by their symmetry
by their mode of locomotion
by their mode of nutrition
Answer:
by their mode of locomotion
Explanation:
I'm not too sure but.. :)
Find the stoma. Explain the gas exchange process that is taking place.
please help :(