Answer:
nucleosomal histones (H2A, H2B, H3 and H4) strongly interact among them and with DNA in order to form nucleosomes. In consequence, it is expected that mutations in histone genes have deleterious effects on the organization of the chromatin
Explanation:
Nucleosomes are well known to be the basic structural units of DNA packaging in eukaryotic cells. Each nucleosome consists of an octamer of histone proteins, i.e., two copies each of the histones H2A, H2B, H3, and H4, and one segment of DNA wrapped around this octamer of histones. Chromatin organization is fundamental o regulate key cellular processes, including gene expression and genome maintenance. In consequence, it is expected that histone proteins are evolutionary well conserved across the eukaryotic kingdom.
The condition influenza is caused by a virus
Answer:
True.
This means antibiotics will have no effect on the infection.
An example of a virus caused by a bacteria would be pneumonia.
Which of the following mutations is most likely to become fixed in a population? A neutral or nearly neutral mutation in a very small population. A beneficial mutation in a very small population. A beneficial mutation in an extremely large population. All of these mutations are equally likely to be fixed. A neutral or nearly neutral mutation in an extremely large population. Item at position 4
Beneficial mutations are more frequently fixed in large populations than in small ones, whereas deleterious mutations are more frequently eliminated.
Explanation:
7. The characteristic of life in which an organism obtains and uses energy is
A- homeostasis.
B- evolution.
C- growth and development.
D- metabolism.
3. In tropical regions,
a, a permanent thermocline traps nutrients in the deep water
b. primary productivity is high all year round, because there is a constant supply of solar energy for
photosynthesis
c, the thermocline disappears in the winter
d. the upper and lower layers of water mix all year round
Answer:
a, a permanent thermocline traps nutrients in the deep water
b. primary productivity is high all year round, because there is a constant supply of solar energy for photosynthesis.
Explanation:
Thermocline occurs in the tropical regions because the temperature is very high which warms the upper layer of water bodies whereas the lower layer of water has low temperature due to no sunlight. The primary productivity is high all year in the tropical regions, because there is a constant supply of sunlight that is needed by the plants for preparing their own food.
How does altitude (elevation) affect climate
A meteorologist for a radio station announces that the humidity is high and the air pressure is low. Which additional data would also describe the
current local weather?
Can someone help me with this please?
Answer: D: All of the above
Explanation: Everything it listed is accurate.
List the organisms in a food chain of your choice. Label each organism as producer, primary consumer, secondary consumer and tertiary consumer (top
consumer).
Explanation:
producer(grass)primary consumer(zebra)secondary consumer(lion)tertiary consumer(vulture)
3. In centaurs, the allele for curly tails (T) is incompletely dominant to the allele for straight tails (t). The hybrid genotype results in wavy tails. In a population of 1500 centaurs, 315 have curly tails, 820 have wavy tails, and the remainder has straight tails.
a. Determine the allele frequencies of: T = ____________ t = ____________
b. Determine the genotype frequencies of TT = ___________ tt = ____________
Answer:
a. Determine the allele frequencies of:
f(T) = 0.485 ≅ 0.48
f(t) = 0.515 ≅ 0.52
b. Determine the genotype frequencies of the exposed generation
F (TT) = 0.21F (Tt) = 0.55F (tt) = 0.24the genotype frequencies of the next generation
F(TT) = 0.23F(Tt) = 0.5F(tt) = 0.27Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
Plants, like all organisms, adapt to the conditions of their environment. Some special challenges a plant may face are drought, flooding, and a salty environment. Your task is to identify and describe ways that plants adapt to these challenging conditions in their environment. Select one plant adaptation to drought, one adaptation to flooding, and one for salt tolerance. Explain how each adaptation enhances plant survival. Identify a scholarly source of information for each. Use quotes appropriately; be sure your responses are written in your own words
Answer:
Hydrophytes is flood tolerant plants, barley is salt tolerant crop and sorghum is a drought tolerant crop.
Explanation:
Hydrophytes also known as flood tolerant plants that have adaptations to survive flood problems. The plant has the development of air spaces in the roots and stems which allow diffusion of oxygen from the aerial portions of the plant into the roots. Barley shows a greater degree of salt tolerance by applying method of osmoregulation which helps the plant to tolerate salt stress. Sorghum is a plant that is adapted to drought condition. These plants have less number of stomata and waxy layers on the leaves which lowers the rate of evaporation or transpiration.
explain why strength of lifting weights cannot be passed from parent to offspring in terms of evolution
Answer:
cuz if your parents lift weights but you sit on the couch all day and do nothing dont expect to be in good shape
Explanation:
.Explicati de ce algele pluricelulare au culoarea rosie,verde respectiv bruna ?
Answer:
Due to different pigments.
Explanation:
The multicellular algae are red, green and brown because of the presence of pigments. The red algae are red in colour because of the presence of the phycoerythrin which is a type of pigment. This pigment reflects red light due to already presence in its body and absorbs blue light that is necessary for photosynthesis process. The brown algae contain fucoxanthin pigment and green algae contain xanthophylls pigments that are responsible for its colour so we can conclude that these different types of pigments are responsible for the different colour of algae.
Which of the following correctly compares the types of root structures.
A. tap roots have many small roots while fibrous roots have a primary root and auxiliary roots
B. Tap roots have a root cap and undergo primary growth, fibrous roots lack a root cap and undergo
secondary growth
C. monocots have fibrous roots, dicots have tap roots
D. monocots have tap roots, dicots have fibrous roots
Answer:
C
Explanation:
Dicots have a tap root system, while monocots have a fibrous root system. A tap root system has a main root that grows down vertically, and from which many smaller lateral roots arise.
What are the living and non-living parts of blood called?
Answer:
The non-living component of our blood is known as the extracellular matrix, called plasma,and it makes up 55% of our blood composition and makes blood unique among connective tissues because it is fluid.
Explanation:
Living blood cells)—include red blood cells (RBCs), white blood cells (WBCs), and cell fragments called platelets, and this makes up 45% of our blood composition.
Although bacterial reproduce asexually, certain species can exchange a small bit of
DNA called a plasmid.
True
False
Answer:
True
Explanation:
Answer:
true, they can swap dna with each other, drop it off in their surrounding, or have viruses carry their dna to another bacteria.
Perspex is a form of transparent plastic.
It has a refractive index n = 1.50. A ray of light
strikes the flat surface of a Perspex block with
an angle of incidence of 40°. What will be the
angle of refraction?
what happens to carbon that has been in the soil for millions of years
Answer:
The element carbon is a part of seawater, the atmosphere, rocks such as limestone and coal, soils, as well as all living things. ... When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years.
Explanation:
Select from the drop-down menu the best answer for each question. Which specialized organelle is shown? Which process occurs in the above organelle?
Answer: the person who asked this question attached the answer at the bottom of thier question I Just wanted to put an answer so people won‘t miss it.
Explanation:
Answer:
the person so submitted this question also had the answers attached, but it's Mitochondrion and Cellular Respiration
Explanation:
HELP PLSSSSSSSS PLS PLS PSL
In moths, White wings are dominant to tan wings. If a Ww moth is crossed with a ww moth, what are the possible phenotypes for their offspring? (Draw a Punnett square to help you.)
0% White, 100% Tan
25% White, 75% Tan
50% White, 50% Tan
75% White, 25% Tan
100% White, 10% Tan
Answer:
The genotypes are: Ww,Ww,ww,ww
So we will have 50% White, 50% Tan
What do krill eat and how long do they live?
Answer:
Krill eats pelagic algae
Antarctic krill are filter feeders that eat tiny phytoplankton (pelagic algae). They use their small, hair-like legs to filter out these microscopic algae that bloom in the nutrient-rich waters around Antarctica.
Explanation: They live till 10 years
Vitamins and minerals are both
A
high in protein.
B
macronutrients.
С
not found in food.
D
small compounds.
Answer:
high in protein i believe.
Explanation:
Define earthquake (dont goo gle)
Answer:an earthquake
Explanation:an earthquake is a violent shaking of the ground and it also creates greate destruction
Select ALL of the following genotypes below that respresent males.
XXY
XX
XYY
XXX
XY
Answer:
Is it XXX that all males want?
Explanation:
Just joking! I still think it is XXY
The genotype that represents males is XY of 50 % of both X and Y chromosomes where a slight change in the alignment might cause to chromosomal disorders .
XXY , XYY , XY represents males genotypes.
What are chromosomal disorders ?
These are the disorders which are associated with the change in the normal XY sequence of males. Various disorders and syndromes are associated with the mutation and the responsible factor can be trisomy like.
XXY is a chromosomal mutation found in the males only called as Jacob syndrome, XYY is a chromosomal disorder called as klinefelter syndrome found in males only.
XX is the genotype of a female, XXX is a condition that affects 1 in every 1000 females.
Thus, except XX and XXX is the exception as both of these represent females.
Learn more about chromosomal disorders at :
https://brainly.com/question/2753255#
#SPJ2
Please help :)
Multiple Choice: Circle the letter of the best answer
Which of the following describes the direction in which the Earth's plate
A. They can move to the right.
B. They can move to the left.
C. They can move up and down.
D. All of the above
Explanation:
the answer is a they can move to the right
A. Caudata B. Apoda C. Anura
1._____ Majority of species from this order occur in North America.
2. _____ Most species in this order have heads designed for burrowing and live in tunnels under the ground.
3. _____ Females can lay anywhere from 2 - 25,000 eggs.
4. _____ Caecilians belong to this order.
5. _____ Long hind limbs and a pelvic girdle modified for leaping.
6. _____ Species in this group can give birth to live young.
7. _____ Well-developed tails used for swimming.
8. _____ Some have adaptations, which allow them to glide from trees.
9. _____ The most diverse and widespread of all the orders.
10. _____ The young of this group eat the skin off their mothers.
11. _____ Most species are blind or have poor vision.
12. _____ Some adults retain larval or juvenile features.
13. _____ Order name translates to “without tail”
14. _____ Sizing range from 1 inch to 6 feet in length.
15. _____ Vocalization is an important part of their reproductive success
I dont really understand where someone would get this information. was there a document or article you were supposed to read before this if so that would be very helpful.
WBCS are often called soldier of the body why
Answer:
WBC are called the soldier of body because
they make antigen to fight against the
any external things that try to
harm our body
by doing this they prevent our body
from being affected by these things
that's why they are called soldier of the body
.
Traits that are due to _______ are considered to be acquired traits.
A education
B nutrition
C injuries
D all of these
What is an example of weathering, erosion, and deposition in Texas? (A)Gradual change to Guadalupe Peak (B)All of the above (C)The changing coastline of Texas (D)The creation of Palo Duro Canyon
Answer: Weathering, erosion, and deposition from the terrestrial surface topography and soil characteristics. These processes, for example, have formed a variety of landforms in Texas like beaches, plateaus, mountains, and canyons as well as soil types like fertile soil, clay-rich soil, and sandy soil. The combination of topography, soil, and climatic conditions in an area defines the types of habitats that the area can support this is crucial to ecoregion classification. Ten separate ecoregions occur in Texas including 1) East Texas Pineywoods, 2) Gulf Coast Prairies and Marshes, 3) Oak Woods and Prairies, 4) Blackland Prairie, 5) cross timbers and prairies (6) Rolling Plains, (7) High Plains, (8) TransPecos, (9) South Texas Plains, (Brush Country), and (10) Edwards Plateau. Such ecoregions are named for the major types of habitats topographical features (e.g. Edwards Plateau) present in their areas. The weathering, erosion, and deposition of each of these ecoregions have an important influence. Hope This Helps :)
Answer:
all the above
Explanation:
weathered soil and rock from the ecoregion is eroded and deposited in the upper south Texas plains ecoregion
HELP PLS THIS IS DUE IN 20 MINUTES AND I FORGOT 2 STUDY
Why are lichens a good pioneer species after a volcanic eruption?
a - They are able to grow on moist soil.
b - They are able to grow on bare rock.
c - They are able to attract animals.
d - They are able to grow without water.