1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ipatiy [6.2K]
3 years ago
15

In assembling a nucleosome, normally the …(1) histone dimers first combine to form a tetramer, which then further combines with

two … (2) histone dimers to form the octamer.
Biology
1 answer:
Readme [11.4K]3 years ago
7 0

Answer:

option 1

Explanation:

In assemblying the nucleosome, this reaction occurs in two main steps. the H3 and H4 are recruited first to the DNA in pairs forming the H3/H4 tetramer; meaning two of H3 and two of H4. This gives rise to the nucleosome precursor. Then after this, the dimers of both H2A/H2B are recruited to this precursor, to give rise to the octamer structure around which the DNA is wrapped.  

You might be interested in
A farmer has two types of cattle on his farm. One type grows very large, but takes a long time to grow. The other type grows qui
Zielflug [23.3K]
If the farmer were to breed both of the two different types of cattle he would have a hybrid type of new cattle with both traits  :)
7 0
3 years ago
Compare the arrangement of muscles in earthworms to amphioxus
mafiozo [28]

Earthworms have two muscles which is used in locomotion. Both muscles are circular and longitudinal (inner layer of the series of muscles). The diameter of the earthworms body is reduced when the circular muscles are contracted which makes them appear to be thin. The worm appears short when the longitudinal muscles contract thus, its length is reduced.

 

Amphioxus on the other hand,  have two unique muscle fiber types. This includes  deep fibers and smaller but mitochondria-rich superficial fibers. E<span>ach of which has its own innervation.</span>

6 0
3 years ago
how do fossils give evidence of continental drift? List 2 examples using fossils found on different land masses.
Ivanshal [37]

Answer:

Explanation:

There are many examples of fossils found on separate continents and nowhere else, suggesting the continents were once joined. If Continental Drift had not occurred, the alternative explanations would be:

The species evolved independently on separate continents – contradicting Darwin’s theory of evolution.

They swam to the other continent/s in breeding pairs to establish a second population.

5 0
2 years ago
After watching the video, how would you define the term ecological relationship? Are they always beneficial to organisms involve
dangina [55]

Answer:

There is no video but ecological relationship will be defined on a general note and it is not always beneficial to organisms.

Explanation:

In an ecosystem, organisms of the same or different species tend to interact with one another. This interaction is referred to as ECOLOGICAL RELATIONSHIP between the involved organisms. An ecological relationship can be of different types depending on the effect.

SYMBIOSIS is an ecological relationship between two organisms that interact together. SYMBIOSIS can either be mutualistic (both organisms benefit), parasitic (one organism loses and one gains), or commensalistic (one organism benefits and one neither benefits or loses). Another ecological relationship is PREDATION, where one organism called the PREDATOR feeds on part or all of another organism called PREY in order to obtain energy.

As stated above, some of the organisms involved in an ecological relationship benefits while others lose. Hence, it is not always a beneficial relationship to organisms.

7 0
3 years ago
What force holds stars together
melamori03 [73]
It is Gravity.
Hope this helps.
4 0
2 years ago
Other questions:
  • Suppose that you mated a black male rabbit with a white female rabbit and that the female gave birth to eight bunnies. If white
    9·2 answers
  • Can anyone explain the development stages of foetus in ownwords/understanding?
    11·1 answer
  • Which of the following tastes may be detected at very low concentration?
    11·2 answers
  • Which statement best explains why the beaks of finches in the Galápagos Islands are different based on what they eat
    14·1 answer
  • A scientist looks into a microscope and sees that chromosome pairs are in bipolar tension. Which mitotic phase is the scientist
    8·2 answers
  • Write a good paragraph about what you already know about Earth’s air, water, solid Earth, and life on Earth. Please use complete
    8·1 answer
  • Pleaseeeeeeeee helppppppp
    12·1 answer
  • List the imputs and outputs of photosynthesis. What part of the plant are responsible for taking in each of the imputs
    5·1 answer
  • Recalling Darwin's Theory
    7·1 answer
  • What are sunspots? storms on Earth’s surface storms on the Sun’s surface hot gases on the Sun holes in the Sun
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!