Answer:
In eukaryotes, nucleosomes play major roles in chromatin organization and gene expression
Explanation:
In eukaryotic organisms, chromosomal DNA is packaged with the help of proteins called 'histones' to form chromatin. The nucleosomes represent the basic packing units of the chromatin. Each nucleosome is composed of a histone octamer containing each two histones H2A, H2B, H3 and H4 wrapped around by 147 bp of DNA. Nucleosomes act as scaffolds to form higher-order chromatin structures (i.e., 30-nm chromatin fibers and condensed chromosomes). Moreover, nucleosome histone proteins can be chemically modified at defined amino acid residues, and thus nucleosomes also provide an epigenetic layer of information that can promote or inhibit gene expression.
The coral reef has specific temperatures and sunlight each day, as well as many types of corals and fish that live there. What level of organization is the coral reef?
A. Organism
B. Population
C. Community
D. Ecosystem
Answer: Organisms
Explanation: Shelter, find food, reproduce, and rear their young in provide jobs for local communities, and offer opportunities for recreation. These ecosystems are culturally important to indigenous people
Why is the color of blood carried by veins dark red?
veins are further below the skin and more difficult to see
this blood has no carbon dioxide to color it
this blood has a low oxygen content
this blood has a high oxygen content
In the human body, organ-systems interact with each other to maintain homeostasis. Using the diagram below, explain how this system interacts with another in the body to maintain homeostasis?
Answer:
D
Explanation:
Im pretty sure tell me if im right
Homeostasis is a regulating process of the body in response to external environments, digestive system provides glucose for cellular respiration.
How do organ systems interact to maintain homeostasis?Organ systems in our body are regulated with each other and these interactions maintain homeostasis.
The respiratory system interacts with the circulatory system for gaseous exchange and the excretory system depends on the circulatory system for blood filtration, and the nervous system regulates the system through the brain.
Homeostasis is necessary because the external environment can change anytime, and the digestive system maintains food conditions according to the body's needs.
Therefore digestive system maintains homeostasis by providing glucose for cellular respiration.
Learn more about organ system interaction for homeostasis, here:
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nucleic acid used in a 9th grade level sentence
don’t send links
Most exact matching problems arise when handeling nucleic acid sequences.
Certain tags can enter the nucleic acid database and identify the trapped gene.
The structure of nucleic acid junctions plays a central role in their biological function.
I need help fast please!
Answer:
Kinetic energy, I think, but I'm not 100% sure
The blood in veins is
d. traveling to the heart.
b. moving in single file.
a. leaving the lungs.
c. carrying oxygen.
Answer:
D. Traveling to the heart
Explanation:
The arteries carry oxygen and nutrients away from your heart, to your body's tissues. The veins take deoxygenated blood from the tissues and back to the heart.
• Homologous structures show ____ _____ on a____ anatomical theme. These are seen in organisms that are____ related. Give an example of a homologous structure from this activity:____
Explanation:
Homologous structures show individual variations on a common anatomical theme. These are seen in organisms that are closely related. 1. Give an example of a homologous structure from this activity: Crocodile
NEED HELP PLS DUE IN 30 MINS Solve 1-5
In the troposphere, the higher the altitude (distance from the ground), the _______ the atmospheric pressure.
Answer:
Explanation:
The troposhere is the lowest layer in the atmosphere and the largest in mass taken about 80% of the mass.
The higher the altitude in the troposphere the lower the atmospheric pressure. At the bottom of troposphere the air is very warm and it gets cool as one moves through the troposphere. The density of the air also decrease with altitude or height above the sea level and this cause the cabins of high-flying jet aircraft to be pressurized.
The atmospheric pressure in the troposphere is lower with higher the altitude (distance from the ground).
What is troposphere?The troposphere is the lowest layer of the atmosphere of Earth. This layer contains the 75% of total mass of the atmosphere.
The variation in the temperature and atmospheric pressure in troposphere layer-
Temperature- The temperature of troposphere is decreases with increasing the altitude of this layer. Atmospheric Pressure- Troposphere ranges the atmospheric pressure between 1000 millibars to the 100 millibars. The value of atmospheric pressure is decreases with increasing the altitude of this layer. It drops 1 inch of Mercury per 1000 ft above the level of the sea.Thus, the atmospheric pressure in the troposphere is lower with higher the altitude (distance from the ground).
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I NEED IT NOWWW ASAP PLEASEE ITS A TEST
Plants with dark brown stems mated to ones with light colored stems: All offspring have a medium brown color.
C. Incomplete dominance
D. Polygenic
E. X-linked gene
B. Codominance
A.Dominant/recessive gene
Answer: could be Polygenic whish you the best in your test i had to take my test at home while everyone at school does it
Offspring that are produced through sexual reproduction are usually similar, but never identical to their parents. This is because?
OA.
genes are not transferred between parents and offspring during sexual reproduction.
ОВ.
half of the offspring's genes come from one parent while the other half comes from the other parent.
OC
genes mutate during every occurrence of sexual reproduction,
OD
all of the offspring's genes only come from one parent or the other.
Answer:
half of the offspring's genes come from one parent while the other half comes from the other parent.
Explanation:
The reproductive handicap for sexual reproduction refers to __________. View Available Hint(s) The reproductive handicap for sexual reproduction refers to __________. diluted genetic investment in offspring dependence on hormonal cycles the need to provide energy for the offspring the difficulty of finding mates the need for maturation prior to reproduction
Answer:
diluted genetic investment in offspring.
Explanation:
Reproduction can be defined as a biological process which typically involves living organisms producing an offspring.
Basically, there are two (2) methods of reproduction and these are;
I. Asexual reproduction: it involves the cloning of a living organism to produce an offspring because there is only a single parent.
II. Sexual reproduction: it involves the combination of the genome (gamete) of a male and female living organism during fertilization.
Generally, asexual reproduction produces more reproductive offsprings than sexual reproduction, this is referred to as a reproductive handicap.
Hence, the reproductive handicap for sexual reproduction refers to diluted genetic investment in offspring.
This ultimately implies that, the sexually reproducing female would have a 50% genetic material passed to its female and male offspring.
However, sexually reproducing female has 100% transfer of her genetic materials through asexual reproduction.
Identify the major players shown in the simulation: mRNA, Codon, Amino Acid, tRNA, anticodon, ribosome.
Answer:
mRNA, tRNA and ribosome
Explanation:
mRNA, tRNA and ribosome are the major players because they perform a very important functions. Messenger RNA (mRNA) is a molecule in cells that carries instructions in the form of codes from the DNA to the sites of protein synthesis which is a ribosomes. Transfer RNA (tRNA) is a type of RNA molecule that helps in decoding a messenger RNA (mRNA) into a protein. Ribosome is an organelle present in the cell that is responsible for the production of proteins according to the instruction given by DNA.
Can u plz tell me five facts about the primary succession
Answer:
Primary succession begins in barren areas, such as on bare rock exposed by a retreating glacier.
Explanation:
Charli thinks she does better on tests after she has had coffee in the morning. One morning she drinks a cup of Folger's coffee and then does very well (A-) on her chemistry test. She does it again before her next chemistry test and again does very well (B+). Now she is convinced her hypothesis is right?
Answer:
Her hypothesis is right.
Explanation:
The Charli's hypothesis is right because caffeine present in coffee helps in boosting of memory if consume it in a normal range. Recent research indicates that caffeine may enhance long-term memory of an individual. When the memory is boost so the individual has the ability to memorize more knowledge that leads to good performance in the examination so the caffeine present in the coffee helps Charli to give good results in the test and we can say that her hypothesis is right.
Please help me
Charlie took 6 minutes to run a mile. His sister, Christina, took 12 minutes to run a mile. Which of the following is true?
A. Christina ran faster than Charlie.
B. Charlie ran faster than Christina.
C. It cannot be determined who ran faster.
D. Charlie and Christina ran at the same speed.
Answer:
A. Charlie ran faster than Christina
Explanation:
Charlie: 6 mins per 1
Christina: 12 mins per 1
12 is longer than 6
An animal ate a plant and digested sugars stored in the plant's leaves. The sugars provided energy
to the animal's cells. Describe which organelles the sugar molecules must have passed through.
Answer:
Mitochondria
Explanation: Mitochondria are oblong shaped organelles found in the cytoplasm of all eukaryotic cells. In plant cells, they break down carbohydrate and sugar molecules to provide energy, particularly when light isn't available for the chloroplasts to produce energy.
Which of these is a characteristic of young amphibians?
long tails
legs
gills
lungs
Answer:
gills
Explanation:
They need the gills since they are first born underwater and live part of their life down there. They don't grow tails, legs, or lungs until later on
Ex: tadpoles
Help quick!
Which systems are involved with the breakdown and delivery of nutrients from recently eaten food to the cells and the removal of waste materials from the body?
A.
excretory, skeletal, and digestive
B.
digestive, nervous, and endocrine
C.
excretory, circulatory, and nervous
D.
digestive, circulatory, and excretory
Answer:
B
Explanation:
I can't be c or d because it involves the heart. And it can go through the skeleton
For this structural characteristic, decide if it is a characteristic of DNA , a characteristic of RNA , a characteristic of both DNA and RNA , or a characteristic of neither DNA nor RNA .
It contains thymine as a base.
What was the general pattern of population growth in the greater Atlanta area, from 1990 to 2000
Answer:
Positive growth.
Explanation:
The general pattern of population growth in the greater Atlanta area from 1990 to 2000 is positive means there is increase occur in the population. The population of greater Atlanta in 1990 is 2,184,000 while on the other hand, the population of Atlanta is 3,522,000 in the year 2000. So there is 1,338,000 people increase occur in 10 years of duration from the year 1990 to 2000. So we can conclude that the pattern of population is positive and upward.
Explain why physical appearance or morphology is not always useful for identifying organisms belonging to the same species
beak shape, camouflage, and webbed feet are all examples of which type of adaptation
Answer:
beak shape: used to help an animal eat food like tearing apart food or either cracking nuts.
Camouflage: the color or shape of an animals body helps it blend into its envierment.
weebbed feet: help animal's propel themselves through the water with ease. This can help the animal swim faster to
catch prey or escape a predator. Also, if an animal has to swim long distances,
webbed feet can help it save energy so it can swim farther.
Explanation:
Hope this helps
Chelsea is reading about astronauts. She discovers that astronauts weigh less on the Moon than they do on Earth. Which of the following best explains why astronauts weigh less on the Moon than on Earth?
Group of answer choices
Earth's gravity is stronger than the Moon's.
Astronauts have less density on the Moon.
Earth has more friction than the Moon.
Astronauts have more mass on Earth than on the Moon
Darwin's theory of evolution did NOT contain the concept that
O favorable traits are passed from one generation to the next.
O resources are unlimited in environments.
genetic variations are produced by mutations and sexual recombination.
organisms that are best adapted to their environment survive
Answer:
favorable traits are passed from one generation to another
Explanation:
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An organism, by definition, consists of multiple cells.
True
False
What is identified in blood type analysis?
Different polysaccharides
Different proteins
Different lipids
Different amino acids
Each trait a person has, such as eye or hair color, is ultimately the result of a single allele in DNA.
True
False
What does "diction" mean in these sentences?
Answer:
The act of pronouncing clearly.
Explanation:
I did it on iReady =)
Answer:
im pretty sure its the third one "the act of pronouncing clearly"
Explanation:
in the sentences its says " i work to say each word exactly right"
hope this helps
Please help <3 Will give brainliest
Answer:
A
Explanation:
state two changes which take place in the flower after pollination
After pollination and fertilization following changes occur in a flower: (i) The petals, stamens, style and stigma of the flower fall off. (ii) Sepals dry up and hold the ovary. (iii) The ovules confined in the ovary develop into seeds.
PLEASE HELP. 10 POINTS!!!
Answer:
i believe the answer is c