Flowering Locus C (FLC) is a gene that is responsible for flowering in certain plants. FLC is expressed in new seedlings, which prevents flowering. Upon exposure to cold temperatures, FLC expression decreases and the plant flowers. FLC is regulated through epigenetic modifications. What type of epigenetic modifications are present in new seedlings and after cold exposure

Answers

Answer 1

Answer:

- New seedlings: histone acetylation

- After cold exposure: histone methylation

Explanation:

Vernalization is an adaptive mechanism whose objective is to ensure that flowering occurs only after winter (i.e., after cold conditions). In certain plants, this process (vernalization) suppresses the expression of genes that encode repressors of flowering. In Arabidopsis, vernalization is associated with histone modifications at FLC chromatin. The FLOWERING LOCUS C (FLC) is a MADS-box gene that acts as a repressor of flowering in Arabidopsis. Epigenetic modifications control the expression of the FLC gene. The FLC gene is expressed at low temperatures due to histone acetylation at FLC chromatin, and thereby the expression of FLC mRNA transcripts ensures that the Arabidopsis plant cannot flower. Subsequently, as the Arabidopsis plant is exposed to cold, FLC is repressed by the accumulation of trimethylation on lysine 27 of histone 3 (H3K27me3), thereby allowing it to flower when temperatures become warmer.


Related Questions

The cell cycle is the life of the cell from the time it is first formed from a dividing parent cell until its own division into two cells

Answers

Explanation:

cell cycle is made up of three main parts: interphase, mitosis, and cytokinesis. Most biologists agree that interphase makes up the period of time that a cell would be preparing for cell division. Cells spend the majority of their lives in this stage. During interphase a cell is going to be growing, replicating its genetic material and essentials to carry out cell division, and proofreading the genetic material to ensure replication has occurred correctly. This doesn’t sound like much, but it’s actually the longest part of the cell cycle. Once this is complete, the cell will then go through cell division and, theoretically, split into two new cells (cytokinesis).

How cytokinesis works will depend upon the type of cell that is dividing. Here is an image that summarizes the differences in cytokinesis in plant cells and animal cells, which is the classic example used in many introductory biology courses:

1. Which of the following best explains how
behaviors, such as swarming and flocking, help
protect organisms?
a. Individuals in swarms or flocks act as decoys
to distract predators.
b. The movement and size of the swarm
or flock confuses predators.
c. Working together in swarms or flocks
requires less energy
d.The size of most swarms and flocks
can overtake larger predators.

Answers

d

The size of most swarms and flocks can overtake larger predators.

which is the method of estimating fish in a pond​

Answers

Explanation:

There is a popular sampling method called capture – recapture or 'Lincoln Index' or 'Pieterson's Method' which is used to estimate the size of an animal or human population.

A student is given a list of traits and is asked to organize them in a Venn diagram as shown below.

Which traits should the student put in section II (Both)?
1 a scar and blood type
2 tiger's stripes and wolf's social status
3 musical talent and wolf's social status
4 musical talent and skin color

Answers

Answer: The correct answer is option B) a scar and wolf's social status.

The acquired traits can be defined as the traits, which are only influenced by the environment of the organism. The acquired trait cannot be passed down to the offspring, as they are not genetically determined. A scar and the social status of any organism is dependent on the behavior of the organism to the environment, no genes code for both of these characters. So, scars and Wolf's social status is an acquired trait.

Explanation:

A scientist is examining cells under a microscope. Which would best help the scientist identify the tissue as plant or animal?

A. The presence or absence of a cell wall

B. the presence or absence of DNA

C. Plant cells would be green

D. Animal cells would contain a nucleus

SORRY FOR THE LITTLE POINT PLEASE ANSWER ITS DUE IN 2 MINUTES ​

Answers

Answer:

I think the answer is A

Explanation:

The presence or absence of a cell wall is examining cells under a microscope.

What is Cell wall?

Cell walls are a specific type of extracellular matrix that cover every plant cell. Many of the traits that set plant cells apart from animal cells are caused by the cell wall.

The cell wall serves a variety of activities that are essential to plant life, despite being frequently thought of as an inert product used only for mechanical and structural purposes.

These include:  giving the living cell mechanical defense and a chemically insulated environment; offering a porous medium for the circulation and distribution of water, minerals, and other small nutrient molecules.

Therefore, The presence or absence of a cell wall is examining cells under a microscope.

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The female reproductive and endocrine systems work interactively for which main purpose?

A. To control hormone levels to prepare the body for pregnancy

B. To maintain homeostasis by removing waste products from the body

C. To release neurotransmitters during times of stress

D. To exchange gases to support cellular aerobic respiration

Answers

The answer is definitely A.

What changes when a cell divides into two daugther cells to make it easier for the cells to exchange materials across the surface of the cell? A. Cell division does not make it easier to transfer materials across the cell surface. B. The new cells move materials faster. C. Each new cell has an increased surface area to volume ratio​

Answers

The new cell has an increased surface area to volume ratio​ is a process that makes easier the exchange of materials across the surface of the cell (Option C).

What is cell division?

Cell division is the process by which cells generate new daughter cells, which may be due to mitosis or meiosis in higher organisms.

Cell division is able to increase the surface/volume ratio and therefore it facilitates the movement of materials in the resulting cells.

In conclusion, news cell has an increased surface area to volume ratio​and it makes easier the exchange of materials (Option C).

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‼️‼️‼️
Please helppp

Answers

Answer:

“Hard limits” to population growth are things like food, water, energy, technology, living space, other basic needs and economic factors which limit people’s ability to access these things.

“Soft limits” to population growth are things like education, birth control, the desire for a better life individually and a better global future for humanity, religious celibacy or chastity or abstinence, female empowerment and economic participation, the suffering already caused by overpopulation and the desire to avoid further suffering, malnutrition or non-lethal starvation which reduces sexual libido, pollution and other man made causes of involuntary sterility or low sperm count or low fertility, desire to save the environment, aversion to pain and suffering when understood that population growth causes both.

Countries with better quality of life and access to food and basic needs often have lower birth rates and lower population growth. This shows that soft limits can actually be more effective than hard limits to stop population growth. You have plenty of countries in Africa running into hard limits and having some of the highest fertility and population growth rates at the same time. They also suffer massive problems like war, poverty, disease and low standard of living. This goes to show that running into the hard limits will pretty much let things get as bad as they can get before it stops population growth. The hard limits won’t stop all the suffering caused by overpopulation but will make enough people suffer TO DEATH that the population doesn’t grow. People fear pain, thus the soft limits are more effective when they understand that population growth was responsible for pain or suffering and avoid it.

Which of the following creates an
allluvial fan
A The buildupci sediment at the mouth of a
3. The seriment deposits by the side of flooding
C. The sticons that leave deepvalleys and
D. There is by ters,

Answers

D is the answer to ur question

What is the purpose of the digestive system?

1. Create energy
2. Swallow food
3. Break down food so nutrients can be absorbed

Answers

Answer:

3. Break down food so nutrients can be absorbed

Explanation:

the reasoning is when you digest something your body is breaking down the food into small chuncks so that the nutrients can be absorbed easier

It would be #1&3. The digestive system is needed to break down food so nutrients can be absorbed. From there you body can create its energy.

not #2 - your mouth swallows not your digestive system

Please help me with this!!

1. Which process plays a part in genetic recombination? A. Asexual reproduction. B. Cytokines. C. Independent assortment. D. Mitotic division.

2. Which correctly lists the following terms in order from smallest to largest? DNA, chromatin, chromosomes, nucleosomes.
A. Chromatin, DNA, Chromatin, nucleosomes
B. Chromosomes,DNA, Chromatin, nucleosomes
C.DNA, nucleosomes, chromatin, chromosomes
D. Nucleosomes, DNA, chromatin, chromosomes

3. In a triploid organism, how many alleles are present for each gene per cell?
A. 1
B. 3
C. 6
D. 9

Answers

I) Independent assortment.

II) Nucleosomes, DNA, chromatin, chromosomes.

III) 3.

EXPLANATION:

Recombination scrambles pieces of maternal and paternal genes, which ensures that genes assort independently from one another.

➻ We know that Chromatin is a complex of DNA and proteins that forms chromosomes. Chromatin looks like beads on a string. The beads are called nucleosomes. Each nucleosome is composed of DNA.

Triploids with three different alleles can easily be detected because they have a unique phenotype.

The process involved in genetic recombination is INDEPENDENT ASSORTMENT. The correct order from smallest to largest is DNA, nucleosomes, chromatin, chromosomes. In a triploid organism, there are 3 ALLELES for each gene.

In independent assortment, different gene variants or 'alleles' are independently and randomly assorted into daughter cells, which allows genetic recombination.

In eukaryotic organisms, DNA is associated with histone proteins in order to form nucleosomes, which arrange in higher organization structures called chromatin fibers.

Subsequently, chromatin fibers condense to form structures called chromosomes.

A triploid organism (3n) contains three sets of homo-logous chromosomes, each one containing one allele for a given locus.

In conclusion, the process involved in genetic recombination is INDEPENDENT ASSORTMENT. The correct order from smallest to largest is DNA, nucleosomes, chromatin, chromosomes. In a triploid organism, there are 3 ALLELES for each gene per cell.

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There is no way to get rid of invasive species, so there is no reason to even attempt.
A.) True
B.) False

Answers

Answer:

False

Explanation:

Scientists have tried to remove them or kill them.

Which of the following best describes what carrying capacity is?
A
The quantity of marine life a limited water resource can sustain.
B
The maximum number of a population that an ecosystem can sustain.
C
The total amount of greenhouse gases a specific ecosystem can sustain.
D
The minimum number of predators a specific geographic area needs to sustain itself.

Answers

B. The maximum number of a population that an ecosystem can sustain.

Underground water is an example of

A) a hidden water source

B) a untapped water
source

C) an unusable water source

D) a high salinity water source

Answers

Answer:

i think its a hidden water source

A 38-year-old mother of three presents to her primary care office with complaints of fatigue. She feels that her energy level has been low for the past 3 months. She was previously healthy and taking no medications. She does report that she has gained about 10 lb and has severe constipation, for which she has been taking a number of laxatives. A TSH is elevated at 25 mU/L. Free T4 is low. She is wondering why she has hypothyroidism. Which of the following tests is most likely to diagnose the etiology?
A. Antithyroid peroxidase antibody
B. Antithyroglobulin antibody
C. Radioiodine uptake scan
D. Serum thyroglobulin level
E. Thyroid ultrasound

Answers

Answer:

A. Antithyroid peroxidase antibody

Explanation:

The most common cause of hypothyroidism is autoimmune thyroiditis, also known as chronic lymphocytic thyroiditis or Hashimoto's disease. This condition (autoimmune thyroiditis) is caused by damage of the thyroid gland, which occurs when antibodies of the immune system attack this gland. The thyroid peroxidase test is an enzyme immunoassay widely used to measure the level of autoantibodies against thyroid peroxidase. Patients with chronic thyroiditis often display a positive thyroid peroxidase test. On the other hand, thyroid ultrasound is useful for the initial evaluation of painless thyroiditis in order to distinguish nodules or multinodular goiter. Antithyroid peroxidase antibodies are commonly observed in individuals suffering autoimmune thyroiditis, whereas antithyroglobulin antibodies are observed in different thyroid disorders and autoimmune diseases. Finally, a radioiodine uptake scan measures the amount of radioactive iodine accumulated in the thyroid gland, which is useful only for diagnosing early‐stage of Hashimoto's thyroiditis.

Which organisms break down decaying organisms and produce an inorganic nutrient pool in ecosystems?
Group of answer choices

secondary consumer

decomposers

primary consumer

producers

Answers

Answer:

Decomposers

Explanation:

Decomposers eat decaying or dead organisms to produce the nutrients.

Apply what you know about lipids to explain why the cuticle helps prevent water loss in plants. Compare it to what humans do.

Answers

Answer:

Explanation:

Waxy cuticle is a white powdery substance that is insoluble, it is found usually on the surface of stem or leave and it prevent excessive loss of water through transpiration.

It is an adaptive mechanism used in dry areas or desert to help plants retain water that is needed for their growth by reducing amount of water loss through transpiration.

Cactus is an example of plant with cuticle that thrive well in dry areas

Which gas is used by humans in the process of cellular respiration?

Answers

Answer: Oxygen

Explanation:

During the process of cellular respiration, carbon dioxide is given off as a waste product. This carbon dioxide can be used by photosynthesizing cells to form new carbohydrates. Also in the process of cellular respiration, oxygen gas is required to serve as an acceptor of electrons.

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Answer:

oxygen

Explanation:

we breathe it in during cellular respiration

Which of the following is NOT a type of wetland?
a: marsh
b: bog
c: swamp
d: pelagic

Answers

I think it is d because the other places are of course wet lands.

Explanation:

i have no clue, but good luck, hopefully you pass the test

_____________________________ is famous for his work on natural selection.

a
Charles Darwin
b
Henry Cavendish
c
Babe Ruth
d
Isaac Newton

Answers

Answer:

a

Charles Darwin

Explanation:

experiment yeast fermentation ,what is the purpose of boiling the glucose solution earlier?​

Answers

Answer:

The correct answer is - to sterilize it and remove any oxygen.

Explanation:

Boil the glucose solution to sterilize it and remove any oxygen, leaving behind the glucose needed for anaerobic respiration. High temperature kills all the microbes and sterilizes the solution.

Boiling the glucose solution earlier also helps in removing the oxygen from the solution for preparing the anaerobic respiration in the experiment desired. Sterilization of the solution also helps it in avoiding any microbes to present in the solution and affect the experiment.

7. Mutations in DNA occur when there is a change in the base-pair sequence of a gene. Which of these is
not an accurate statement about mutations?
A. Most mutations occur when a cell copies its DNA for cell division.
B. Mutations can involve adding, removing, or substituting genes.
C. Mutations always cause a change in the phenotype of the organism.
D. Mutations can be beneficial.

Answers

Answer: C

Explanation: None

C. Mutations always cause a change in the phenotype.

Absorbe nutrientes por medio de micro vellosidades que recubren y aumentan la superficie de absorción

Answers

Sobre la pregunta:

Cucigrama. Pregunta 1 vertical. Absorbe nutrientes por medio de micro vellosidades que recubren y aumentan la superficie de absorción

Answer:

Intestino delgado

Explanation:

El intestino delgado es el organi mas largo del tubo digestivo, pudiendo medir 7 metros de longitud y 3 cm de diametro. Se caracteriza por estar sumamente plegado sobre si mismo. La primera porcion, llamada duodeno, recibe secresiones de glándulas biliar y pancreática, y las mezcla con enzimas digestivas. Esta mezcla se encarga de degradar la comida y transformarla en sustancias solubles, como amino ácidos.

Es en el intestino delgado donde ocurre la absorción de nutrientes.  Las paredes intestinales estas cubiertas por microvellosidades que aumentan la superficie de absorción.  

Las microvellosidades son células que componene el epitelio columnar, y que extienden proyecciones hacia el lumen del organo.  

 

The female gametes are called__________. *

sperm
ova

Answers

Female gametes are called ova or sperm while male gametes are called sperm. I hope this helps :)

Answer:

Woman's gametes are called Ova. Sperm is what a mans gamete is.

Explanation:

_______________________ is an animal's ability to blend into its surroundings.

a
artificial selection
b
evolution
c
natural selection
d
camouflage

Answers

D camouflage I’m assuming because that’s what camouflage is used for.

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Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the leopard's spotted coat, the battledress of a modern soldier, and the leaf-mimic katydid's wings.

Organisms of either extreme characteristic dying out while organisms with the medium characteristic have a higher fitness is identified as?

Answers

Answer: Stabilization selection

Explanation:

Natural selection involves the differential survival and growth of organisms which have suitable traits to survive in unfavorable or adverse environment. Such traits are passed on to the next generation. Stabilization selection is a type of natural selection in which the nature selects the non-extreme phenotypic traits. Middle traits are selected and such organisms grow and reproduce. Example can be given that of human babies in which babies with low weight lose more heat and babies with high weight are difficult to be delivered from the pelvis. Therefore, babies with middle weight are expected to survive more than that of low or middle weight.

What is the advantage and disadvantage of drug abuse​

Answers

there are danger and you call someone to help you

In order for water to collect in earths atmosphere and form clouds it must first undergo what process?

A) condensation

B) convection

C) evaporation

D precipitation

Answers

Answer:

The answer is D: Precipitation

Which animal is a tertiary consumer in this food chain?

Answers

Yes there is it snake

Answer: EL ANIMAL QUE ES CONSUMIDOR TERCERIANO  ES LA SERPIENTE

xplanation:PORQUE ES CARNIVORO

Answer soon a possible please!

Bacteria in the soil can release____
back into the air

-oxygen
-hydrogen
-nitrogen
-carbon dioxide

Answers

Answer:

Explanation:

nitrogen

Answer:

nitrogen

Explanation:

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