Answer:
All organisms must regulate gene expression by turning genes on and off different cells at different times. In prokaryotic cells, related genes may be organized into operons , which can be turned on and off as a single unit. Eukaryotes have more complex modes of control, including the packing of chromosomes, RNA slicing (which can produces several mRNAs from a single gene), and the control of translation.
An understanding of gene regulation mechanisms has led to several interesting and important applications. For example, the loss of gene regulation can result in cancer, or out-of-control cell growth. And reproductive cloning can produce new live individuals, while therapeutic cloning can produce potentially therapeutic stem cells.
I need to answer ASAP Pls
Answer:
separate during meiosis l
Explanation:
yan Napo Ang answer Sana makatutulong
match these to the correct definitions pls
Answer: one set - sex cells / two sets - somatic
Explanation:
HELP PLEASE ASAP.
Why do stems have bark? What does the phloem do?
Answer:In old stems the epidermal layer, cortex, and primary phloem become separated from the inner tissues by thicker formations of cork. Due to the thickening cork layer these cells die because they do not receive water and nutrients. This dead layer is the rough corky bark that forms around tree trunks and other stems.
Explanation: wikipedia.
Which of the following is true based on the data?
Choose 1 answer:
Wheres the data
Explanation:
Answer:
Uh sir- i dont see anything, or a picture
Explanation:
Please update a picture so i know what to awnser!
true or false: The main disadvantage of sexual reproduction is that it results in genetic variation among offspring.
Answer:
This statement is false.
Explanation:
it is not a disadvantage rather it is an advantage that it results in genetic variations among offspring.
Give ttwo pieces of information that scientists use to prepare evolutionary trees for living and extinct organisms
Two pieces of information that scientists use to prepare evolutionary trees for living and extinct organisms are the fossil evidence that is found on the earth and the DNA samples, as these two are helpful in the evolutionary tree representation.
What is the significance of the evolutionary tree?An evolutionary tree, or phylogenetic tree, is a diagrammatic representation that shows the relationships between different species or groups and is used to represent the evolutionary history and how organisms are related to one another through common ancestry. The evolutionary tree is important as it helps scientists understand the relationships between different species and how they have evolved over time to form new species.
Hence, two pieces of information that scientists use to prepare evolutionary trees for living and extinct organisms are the fossil evidence that is found on the earth and the DNA samples, as these two are helpful in the evolutionary tree representation.
Learn more about the significance of the evolutionary tree here.
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A geneticist is mapping the chromosomes of the newly captured gremlin. Stripe is heterozygous for three linked genes with alleles Ee, Hh, and Bb, that determine if gremlins are evil (E), have hair (H), and biting teeth (B). In order to determine if the three genes are linked, a standard testcross was done, and the 1000 offspring had the following genotypes: 48 ee Hh bb 36 ee hh Bb 400 ee Hh Bb 4 Ee Hh Bb 426 Ee hh bb 46 Ee hh Bb 38 Ee Hh bb 2 ee hh bb What is the recombination frequency between genes E and H
Recombination frequency determines if two genes are linked or if they segregate independently from each other. The recombination frequency between E and H is 8%
What are linked genes?Linked genes are those that are too close to each other in the same chromosome and they do not segregate independently.
These are the linked genes that do not exhibit an independent distribution, and they are inherited together more frequently.
What is recombination frequency?Recombination frequency can be defined as the crossing over events frequency occurring between two genes.
The value of recombination frequency indicates weather genes are linked or not. The maximum recombination frequency is always 50%.
When RF is 50% or more, we can assume that genes are not linked.
In the exposed example, we can recognize the parental gametes in the descendants because their phenotypes are the most frequent, while the double recombinants are the less frequent.
Parental)
400 ee Hh Bb
426 Ee hh bb
Double recombinant)
4 Ee Hh Bb
2 ee hh bb
Simple recombinant)
48 ee Hh bb
36 ee hh Bb
46 Ee hh Bb
38 Ee Hh bb
We will call Region I to the area between genes E and H and Region II to the area between genes H and B.
------------E------------H--------------B-----------
/---RI------//------RII-----/
To calculate the recombination frequency between E and H we just need to consider region I. We will call P1 to the recombination frequency in this region.
P1 = (R + DR) / N
Where:
R is the number of simple recombinants in this region, DR is the number of double recombinants in each region, and N is the total number of individuals.Now, let us analyze the information.
We know that individuals carrying double recombinant gametes are
Ee Hh Bbee hh bbWe know that the recessive parent from the testcross could only provide the following gametes ⇒ ehb
This leads us to assume that the followings are the double recombinant gametes from the trihybrid parent,
EHBehbSince these gametes are the product of a double recombination event in region I and II, we can assume that the parental gametes of the trihybrid individual are
eHbEhBHence the simple recombinant gametes in region I are
EHbehBNow, according to this analysis, we know that
Simple recombinants in region I
36 ee hh Bb
38 Ee Hh bb
Double recombinants
4 Ee Hh Bb
2 ee hh bb
Total number of individuals
N = 1000
Recombination frequency in Region I
P1 = (R + DR) / N
P1 = (38 + 36 + 4 + 2) / 1000
P1 = 80 / 1000
P1 = 0.08 = 8%
The recombination frequency between genes E and H is P1 = 8%
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what molecules main job is to carry the genetic code?
1. DNA
2. Protein
3. tRNA
4. rRNA
praw a diagram of the different type of
Soil horizon
Answer:
diagram
hope this pic helps you
Answer:
Hope it will help you be happy ^_^
Please answer this ASAP
B
I hope this answer helped! please rate 5 stars >:)
Which part of a flowering plant transports pollen to the unfertilized egg cells?
Which of the following is/are among the functions of the eukaryotic cytoskeleton? Select all that apply.
Answer:
Explanation:
I have no ideaaa. This stuff wack.
The cytoskeleton is made up of a dynamic connection of protein filaments found in all the cells. Under the eukaryotic, it is made by the microfilaments, microtubes. Giving shape and structure to the system.
The eukaryotic cytoskeleton consists of three main types of firmaments. Such as those which are connected by the neurons are know as neurofilaments. These are a distinct types of subnet that have their own character, shape, and size. Being composed of lots of proteins also helps in the division of cells.Hence the option A and E are correct. that it gives cells shape and structure and helps in cell division.
brainly.com/question/21276757.
HELPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
I believe the answer is A
Explanation:
Answer:
physiological responses are things that make you begin to sweat and make your heart rate increase
Explanation:
So im thinking its B and C
and if it isnt multiple choice go with B
What unit do Scientists use to measure force?
A Newton
B Gram
C Meters
D Seconds
Answer:
They use Newton to measure force
Explanation:
All of the following are reasons it might be beneficial for prokaryotes to take up foreign DNA EXCEPT that Question 77 options: a) DNA could be used for food by bacteria. b) the uptake of foreign DNA would result in potentially beneficial recombinants. c) the uptake of foreign DNA might allow a cell to repair damaged chromosomes. d) the uptake of foreign DNA could allow completely new genes with new functions to enter the recipient cell. e) the uptake of foreign DNA could result in the breakage of the plasma membrane of the recipient cell.
Answer:
dna could be used for food by bacteria
Explanation:
not a beneficial reason
All of the following reasons are beneficial for prokaryotes to take up foreign DNA except the use of DNA as food by bacteria. Thus, the correct option is A.
What is DNA uptake?DNA uptake is defined as the conversion of exogenous, DNase-sensitive DNA into a DNase-protected state inside a bacteria. In gram-negative bacteria, this DNA uptake can be achieved by crossing the outer membrane. By contrast, in gram-positive bacteria, DNA uptake is similar to gram-negative bacteria with passage across the cytoplasmic membrane.
The uptake of DNA in bacteria is beneficial as it helps in the production of recombinants that can be used for various purposes. The DNA uptake can be used for the repairing of damaged DNA and chromosomes in patients of genetic disorders.
New genes with different functions can be introduced in organisms like bacteria.
Therefore, the correct option is A.
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Though consumed by millions of people, mushrooms are related to which infectious agent? A. bacteria B. fungi C. parasites D. viruses
B. fungi becaus thats just how it is
What will happen if you keep increasing the temperature of a liquid?
Question 6 options:
It will solidify (turn into a solid)
It will transpire
It will boil and become a gas
It will remain a liquid
Answer:
It will boil and become a gas
Explanation:
Answer:
I'm pretty sure it will boil and become a gas
Explanation:
Which owl was most fit?
O Owl 4 laid 4 eggs, of which all 4 hatched and all 4 young successfully left the nest.
Owl 3 laid 12 eggs, of which 10 hatched and were all eaten by a squirrel.
O Owl 1 laid 8 eggs, of which 6 hatched and 5 young successfully left the nest.
O Owl 2 laid 9 eggs, of which 8 hatched and 3 young successfully left the nest.
Answer:
Owl 1 laid 8 eggs, of which 6 hatched and 5 young successfully left the nest.
Explanation:
What were the gases Miller and Urey
used to recreate the early
atmosphere? Choose all that apply.
methane
oxygen
hydrogen
e
ammonia
TRUE or FALSE? Respiration is the chemical reaction that living things carry out to release energy. Breathing is the movement of air in and out of the lungs
Answer:
True
Explanation:
Which of the following describes how the pollen must travel in order for pollination to occur?
Question 18 options:
. from the stigma to the anther
from an anther to the style
from an anther to the stigma
from the stigma to the pollen tube
Answer:
the answer is C
Explanation:
another word for stamen is anther and i took the K12 test
hope you do great
How can you use genetics to study human inheritance?
Answer:
by analyzing how genes influence the development of phenotypic traits, i.e., by determining the association between phenotypic traits and changes in DNA sequence
Explanation:
Genetics is a discipline that studies how genetic variation, i.e., the variation in the Deoxiriibunicleinc acid (DNA) molecule, is associated with the transmission of heredity, and how the environment influences this process. The DNA is a molecule that carries the instructions to perform all metabolic functions (eg., reproduction, development, growth, etc). Thus, advancements in genetics enabled us to decipher how phenotypic traits pass from parents/ancestors to their offspring/descendence. Genes are segments of DNA that carry the information (genetic information) to determine each phenotypic trait. During reproduction, genes are passed from one generation to the next, thereby transmitting this information across generations.
Which of the following is not one of the principles of natural selection?
O variation
O more offspring than can survive
O finite resources
O infinite resources
Answer:
Infinite resources
Explanation:
There will not always be shelter, food, water, etc...
Which of the following accurately describes an example of a vestigial structure?
After the loss of a single eye, with one eye still present, a patient is still able to see with one eye. The patient complains of
reduced vision and depth perception after recovery.
A patient is having severe abdominal pain due to a ruptured appendix. The patient has an appendectomy, in which the
appendix is removed. The patient recovers and notices no life changes due to this surgery.
O A patient has a benign mass on the head of the pancreas. The mass is removed, along with a portion of the pancreas. This
results in reduced insulin production in the patient, causing them to be incapable of using glucose for energy, without the
aid of medication. The patient will be required to take an insulin shot once daily.
O A patient has heart disease, and therefore needs a heart transplant. The patient's heart is then removed and replaced with
a functioning mechanical heart. The patient will remain on organ transplant rejection pills for the remainder of his/her life.
Answer:
A patient is having severe abdominal pain due to a ruptured appendix. The patient has an appendectomy, in which the
appendix is removed. The patient recovers and notices no life changes due to this surgery.
Which of the following will lead to a change in current scientific theory?
A. a small group of scientist who studies the theory can make changes
B. A change in the world’s opinion
C. A change in the scientific evidence regarding the theory
D. The person who originally developed the theory can make changes
Answer:
C: A change in scientific evidence regarding the theory.
The option c. A change in the scientific evidence regarding the theory resulted in the change in current scientific theory.
What is a scientific theory?It is a theory that should be explained for the observations for the natural world that should be constructed by using the scientific method.
Also when there is any change in the scientific evidence with respect to the theory so it should have resulted in the change in the current scientific theory.
Hence, the option c is correct.
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5) If a body cell contains 50 chromosomes, how many
will exist in its gametes?
Answer-25
Which of the following contains a single type of element?
gold
carrot
table salt
vegetable soup
Answer:
Gold
Explanation:
Gold is a singular element according to the periodic table. (Labeled Au), and it does not result from chemical bonds or multiple elements, like all other items listed here do.
I really hope this was helpful to you! Thanks and have a nice day!
Describe the relationship
between chlorophyll and the
color of plants.
Answer:
Plants absorb both red and purple light waves, however because purple wavelengths are shorter, they contain more energy. The green pigment involved in photosynthesis is chlorophyll . Chlorophyll is green in appearance because it absorbs red and blue light, making these colours unable to be seen.
Done!!!
5. A logging company cut down all the large spruce trees in an area of forest. After the area was cleared, spruce seedlings began to sprout. Rabbits, birds, and deer returned to the area.
The missing part of the question is -
" Is this Primary or Secondary Succession?"
Answer:
The correct answer is - secondary succession.
Explanation:
Recolonization of the plant and animals to habitat after a major disturbance such as flood, lava eruption, wildfire, or human disturbance is characterized as secondary succession.
In this particular case, there is secondary succession occurs, there is man-made disturbance tajes place as logging company clear the spruce trees from a habitat, and after clearing the land the spruce seedlings began to sprout, birds, rabbits recolonize to the area.
All organs in the human body perform important functions. Which organ controls all
of the other organs and is called the control center of the body?
stomach
B
small intestine
С
brain
D
liver
Answer:
c
Explanation:
Answer:
Well I thought it was the nervous system but that is connected/ made up of the brain so I would go for C, Brain