The N-terminal tail of histone H3 can be extensively modified, and depending on the number, location, and combination of these modifications, these changes may promote the formation of heterochromatin. What is the result of heterochromatin formation
Answer:
Repression of gene expression
Explanation:
Heterochromatin is formed by highly-packed DNA regions. A functional consequence of heterochromatin formation is that these regions become inaccessible to transcription factors, thereby inhibiting gene transcription (genes in these regions are 'switched off'). Heterochromatin is formed by epigenetic modifications added to histone tails that form nucleosomes, i.e., histones H2A, H2B, H3 and H4. The epigenetic marks include, among others, acetylation and methylation.
Describing the Big Bang Theory
Quick
Check
Which statement accurately describes the origin and expansion of the universe?
O As the universe continues to expand, it gradually gets warmer.
Galaxies that are farther away are moving away more slowly.
O Cosmic background radiation is leftover thermal energy from the big bang.
O Stars and galaxies formed almost immediately after the big bang occurred.
Answer:
QWERTY
Explanation:
Chromosomes that have their centromere near or at the center with two equal length arms are called ______.
Answer:
Metacentric centromere
Soo-Jung used the subtraction property of equality to solve an equation for y. Which equation could be the one that Soo-Jung solved? 4 y = 12 StartFraction y Over 4 EndFraction = 12 2 (4 y) = 12 y + 4 = 12
Explanation:
Option 1.
4y=12
Dividing 4 both sides
y=3
Division property should be used.
Option 2.
[tex]\dfrac{y}{4}=12[/tex]
Cross multiplying each other,
y=12(4)
y=48
Option 3.
2(4y)=12
Opening bracktet in LHS
8y=12
Dividing both sides by 8 i.e.
[tex]y=\dfrac{12}{8}\\\\y=\dfrac{3}{2}[/tex]
Division property is used.
Option 4.
y+4=12
Subtracting both sides by 4 i.e.
Y+4-4=12-4
y=8
Subtraction property is used.
It means that in option (4) Soo-Jung used the subtraction property of equality to solve an equation for y.
Answer:
D y + 4 = 12
Explanation:
I just took the quiz and got 100
Uncovered lightbulbs may expose food to which type of hazard
Answer:
chemical is the answer
Which statement best describes a human influence on the biogeochemical cycles?
Answer:
increased eutrophication caused by high levels of nitrogen and phosphorous
Explanation:
Answer:
The movement of a chemical substance through both the biotic and abiotic parts of Earth
Explanation:
Which of the following from Picture 9 is the strongest base? * A. ammonium chloride B. pure water C. tomatoes D. hydrochloric acid
Answer:
Ammonium chloride (sodium hydroxide is stronger but it isn't an option in the question)
Explanation:
pH less then 7 is acidic
pH 7 is neautral
pH higher than 7 is alkali
An alkali is a soluble base.
Ammonium chloride has the highest pH number so it must be a base.
As the force increases, so does the _______ of the object. A.intensity B.speed C.weight D. volume
Answer:
B. Speed
Explanation:
Which of the following actions has an effect on the environment: A Turning lights on in your home B Building a new road C All of these D What you eat
Answer:
its c!!
Explanation:
do sponges have cells
Answer:
no, they dont
Explanation:
how would a sponge have cells? so no
Answer:
Yes?
Explanation:
Generally all living things have cells. They have no organs though.
Why the bass and crayfish benefit from an increased level of phosphate, initially, but then die off
Answer:
Increased levels of phosphate are beneficial to phytoplankton and aquatic plants. In the short-run, this means increased micronutrients for herbivorous and omnivorous fish.
The phosphate, however, reacts with the water to reduce the oxygen levels obtainable in the water. Without oxygen, the fishes die off.
It is not unusual to find that with increased phosphate in water, healthy fishes begin to die off without any other plausible explanation.
The solution is to clean the water or treat it with solutions that impact positively whilst reducing the phosphate levels.
Cheers!
how fungi get there food?
Answer:
hmmmmmmmmmmmnnmmmmmmmmmmm mmmmm
Would we have the Same countries If Pangea existed? And would we look the same?explain please
Which role of protists,fungi, and bacteria has the most positive effect on maintaining the plant population in an ecosystem?
O if they are found in the gut of animals, they can assist in digestion
They are a major food source for animals
They decompose dead materials, returning nutrients to the soil
They produce about 75 percent of the oxygen on Earth
Answer:
They decompose dead materials, returning nutrients to soil
Explanation:
You could say life on Earth depends on the protists because they supply us with oxygen, are critical organisms in food chains, and recycle important nutrients for other life forms to use.
What elements make up a carbohydrate?
Explanation:
Hydrogen, Carbon, Oxygen,
The table shows the energy that is stored in three types of organic molecules. Energy Storage in Humans A 4-column table with 3 rows. Column 1 is unlabeled with entries Free Glucose in Blood, Glycogen, Lipids (Fats). Column 2 is labeled K cal per Gram with entries 4, 4, 9. Column 3 is labeled Energy Storage (k cal) with entries 40, 600 to 1600, 10,000. Column 4 is labeled Life Support Time with entries Few minutes, 1 day, 30 to 40 days. What is the best conclusion based on this data? Blood is a primary location for energy storage. Fat molecules contain more energy-containing bonds than simple sugars. A gram of glycogen has twice as much energy as a gram of fat. The human body stores approximately 1,000 kcal of glucose.
Answer:
B or Fat molecules contain more energy-containing bonds than simple sugars.
Explanation:
The BEST conclusion based on this data is fat molecules contain more energy-containing bonds than simple sugar.
Both glucose and fats are macronutrients that store energy in their chemical bonds.Carbohydrates are polymers composed of monomers or 'sugar molecules' called monosaccharides. Glucose is a simple sugar (i.e., it is a monosaccharide).Lipids (fats) are polymers composed of fatty acids and glycerol.According to data, free glucose contains four (4) Kcal per gram; whereas lipids (fats) contain nine (9) Kcal per gram.In conclusion, the BEST conclusion based on this data is fat molecules contain more energy-containing bonds than simple sugar.
Learn more in:
https://brainly.com/question/8044425?referrer=searchResults
The two days of the year when the Sun's rays are exactly on the equator are called _____.
Answer:
equinox
Explanation:
It occurs 2 times a year where the sun shines exactly on the equator on September and March
How can Scientific beliefs be used incorrectly to fool people into thinking they are Scientifically founded
Answer:
Is really common that all the studies and scientific advances that we find today, born as an idea or hypothesis (that in a lot of cases is not the same as the end result).
So for example, suppose that a group of scientists is trying to find a cure to a certain disease, and they think that they may have found it, but there are not enough tests (for example they may try it in rats, but not in humans yet)
As the group starts to find results, they may share them (especially if they are positive), and here is when a given communicator/periodic takes this information and makes a claim like "Group of scientist finally finds the cure for...."
So in this case the media is using the fact that a group of scientists "thinks" something as a valid claim to affirm something.
There is also the case where a scientist says something (That has logic and scientific value only in context) and then the media uses some part of the scientist's statement out of context in order to affirm a given idea.
The unit of androecium is
Answer:
The unit of androecium is stamen. The plural of stamen is either stamina or just stamens. An androecium is usually made up of multiple stamina
Answer:
The unit of androecium is stamen. The plural of stamen is either stamina or just stamen. An androecium is usually made up of many or multiple stamen
Tyler is admitted to the hospital after an accident. In the hospital, Tyler overhears the doctor telling his mom that although he has a fracture in the axial skeleton, he’s lucky because the bone doesn’t protect any vital organ that’s essential for survival. Which bone has Tyler fractured?
Answer:
The correct answer is mandible
Mandible is a lower jaw bone that does not protect any organ in our body.
It is located in the facial region and is the strongest and largest bone of the mouth.
Mandible contains a region for the lower teeth and forms a temporomandibular joint.
The structure of mandible is comprised of two regions:
- The horizontal body (anteriorly)
- Two vertical rami (posteriorly)
Explanation:
Explain the three mechanisms of heat transfer in Earth’s atmosphere.
Explanation:
There are three ways heat is transferred into and through the atmosphere.
radiation. conduction. convection.
Radiation
Radiation is the transfer of heat energy through space by electromagnetic radiation.If you have stood in front of a fireplace or near a campfire, you have felt the heat transfer known as radiation. The side of your body nearest the fire warms, while your other side remains unaffected by the heat. Although you are surrounded by air, the air has nothing to do with this transfer of heat. Heat lamps, that keep food warm, work in the same way.
Conduction
Welding iron is transferring heat by conduction
Conduction is the transfer of heat energy from one substance to another or within a substance. Have you ever left a metal spoon in a pot of soup being heated on a stove? After a short time, the handle of the spoon will become hot.This is due to transfer of heat energy from molecule to molecule or from atom to atom. Also, when objects are welded together, the metal becomes hot (the orange-red glow) by the transfer of heat from an arc.
Convection
convection is the transfer of heat energy in a fluid. This type of heating is most commonly seen in the kitchen with a boiling liquid.
Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air. This bubble of air rises into the atmosphere. As it rises, the bubble cools with the heat contained in the bubble moving into the atmosphere
The three mechanisms of heat transfer in Earth’s atmosphere are radiation, conduction and convection.
What causes conduction in the atmosphere?Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks.
As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air. This bubble of air rises into the atmosphere.
During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction. At night, the ground cools and the heat flows from the warmer air directly above to the cooler ground via conduction.
Learn more about conduction:
https://brainly.com/question/15085692
#SPJ3
Eukaryotes evolved from prokaryote ancestors (the Endosymbiont Theory being a likely pathway). While eukaryotes share some traits with their prokaryote ancestor(s), some features are unique to eukaryotes. What are they?
a. circular double-stranded DNA in the nucleus.
b. ribosomes are used for protein synthesis.
c. membrane-bound organelles.
d. mitosis.
e. mitochondria.
f. photosynthesis.
g. motility.
i. histones associated with DNA.
Which takes up more space, the dorsal or ventral cavity?
Answer:
ventral
Explanation:
Purple flowers are dominant over the white flowers. The parent generation includes two heterozygous parents. What are the possible phenotypes of these parent offspring
Answer:
Purple and white-flowered individuals.
Explanation:
First, let P represents the allele for purple flower trait and p for white flower trait. PP and Pp would be purple and pp would be white flower individuals.
The parents are two heterozygous individuals, Pp.
Pp x Pp
offspring: PP Pp Pp pp
PP and Pp = purple
pp = white.
Hence, the possible phenotypes of offspring from two heterozygous parents are purple and white-flowered individuals.
The process by which secretory products are packaged into vesicles and then released from the cells is known as
Answer:
Exocytosis.
Explanation:
It is Exocyctosis because Exocyctosis is a process where membrane bound secretory vessicles which can contain soluble proteins,membrane proteins, lipids are released from the cell into the extracellular environment.
The release is possible because the vessicles join to the plasma membrane of the cell.
These secretory vessicles are formed from trans Golgi network.
Erythromycin is given to a six-year-old child before dental work to prevent endocarditis. The child weighs 44 lb (20 kg). The order is for 20 mg/kg by mouth two hours before the dental appointment. The bottle comes concentrated as 400 mg/5 ml. How many milliliters should the child receive? Record your answer using a whole number.
Answer:
5 milliliters
Explanation:
Weight of the child = 20 kg
Prescription order = 20 mg/kg 2 hours before appointment
The total amount of erythromycin required by the child= weight of the child x prescription order.
= 20 x 20 = 400 mg
Amount of erythromycin per 5 ml of the bottle = 400 mg
Hence, the total milliliters of the liquid that the child should receive = 5 ml
When does heat produce a chemical change?
Answer:
Heat produces a chemical change when energy is released in the form of light
Explanation:
Jellyfish, mushrooms, oak trees, and bacteria contain cells. Which component of cell theory does this best illustrate? All living things are made of cells. Most organisms are made of cells. All cells come from other cells. Plants are made of cells.
Answer:
All living organisms are made of cells.
Explanation:
Hi!
No matter what is it, if it is a plant, an animal, a bacteria, anything! If it is alive, biotic, living, breathing, it is made up of cells. NO MATTER What! Rocks and sun are not alive so that means they are biotic. Which means they are not made of cells.
I really hope this helps!
Answer:
A all living things are made of cells!
Explanation:
In Zambia, which lions are likely to have migrated from a different population?
How were you able to determine if something was living, once living, or never living (non-living)?
Answer:
If it was once living you would know by the fossils or where it was found. Stuff that is non-living is stuff like rocks and dirt. Living is trees and animals.
Explanation: