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
erik [133]
3 years ago
6

Histones are essentially identical in sequence/structure in all eukaryotic organisms from yeast to plants to animals. What does

this say about the biophysical properties of DNA-packaging and the evolution of eukaryotic organisms
Biology
1 answer:
xxTIMURxx [149]3 years ago
5 0

Answer:

It indicates that core histone genes were present in the last common ancestor of yeasts, plants, and animals

Explanation:

Histones are highly basic proteins that can strongly interact with DNA, which is packaged into nucleosomes, the basic structural and functional unit of chromatin. Each nucleosome is composed of approximately 147 base pairs of DNA wrapped around a core of eight histone proteins (two copies of four types of histones H3, H4, H2A, H2B). These core histones are evolutionarily conserved across eukaryotic kingdoms in terms of sequence and structure. Therefore, DNA-packaging into nucleosomes is considered a constraint for the evolution of core histones. Moreover, the presence of conserved core histones in eukaryotic kingdoms (e.g., yeast, plant, and animal kingdoms) is strong evidence that histone-mediated DNA packaging was presumably present in the last common ancestor of eukaryotic genomes.

You might be interested in
How do fossils and fossil records support the idea that life change over time? How is the fossil age measured?
Alex Ar [27]

Fossils, or preserved parts of organisms from the distant past, have shown that species change over time. Radiometric dating can be used to determine the age of fossils by measuring the how much of the radioactive materials in each rock layer have broken down.

5 0
3 years ago
Plz answer any short answer plzzzz<br> I will mark brainlest
kvv77 [185]
A. Antarctic blue whale

B. Herbivores

C. Inland Taipan

D. “The scientific name Asteroidea was given to starfish by the French zoologist de Blainville in 1830. It is derived from the Greek aster, ἀστήρ (a star) and the Greek eidos, εἶδος (form, likeness, appearance). The class Asteroidea belongs to the phylum Echinodermata.”

E. “First, primates have larger eyes than many other mammals of comparable body size (Ross & Kirk, 2007). Having large eyes ensures that a large image is formed on the retina (Walls, 1942; Land & Nilsson, 2002). This large retinal image may then be sampled by many photoreceptors, improving visual resolution. Primates have flexible shoulder joints and and strong clavicles or collar bones that help them use their arms more effectively than other species of animals. Most primate can hold their bodies erect and some species, including humans, can walk on two legs instead of four.”
7 0
2 years ago
PLEASE HELP ASAP (FINAL)
Alona [7]

Answer:

to have symmetry on your body from side

to side

4 0
2 years ago
Explain the term niche
Wewaii [24]

Answer:

a shallow recess, especially one in a wall to display a statue or other ornament.

3 0
3 years ago
How is the ability to recognize the umami taste an evolutionary advantage?
vova2212 [387]

Answer:

Umami identifies foods that might contain essential amino acids.

Explanation:

You may have heard that our taste buds can recognize the four basic tastes: sweet, salty, sour and bitter. But what many still do not know is that the human taste recognizes one more taste - the "umami".

Umami is recognized by our taste buds when we eat foods that contain substances called aminoacids. The umami flavor is composed of three main substances present in various foods: glutamate, inosinate and guanylate. The ability to recognize umami taste is an evolutionary advantage of humans that represents the ability to identify foods that may contain essential aminoacids.

7 0
3 years ago
Other questions:
  • What is the advantage and disadvantage of animals that have placenta with those do not have placenta.​
    5·1 answer
  • Hemophilia is a disease that causes uncontrollable bleeding. If a father has it, all of his daughters will be carriers of the di
    11·2 answers
  • Imagine a situation in which the number of urea leak channels increased dramatically in the ascending limb of the loop of Henle.
    15·1 answer
  • Why might the type of rock in the hanging wall of the Lewis thrust be different from the type of rock in the footwall?
    8·1 answer
  • Which mutation will cause translation to stop?
    9·1 answer
  • What common breeds get affected by gastrotomy?
    7·1 answer
  • Which of the following structures is associated with sexual reproduction?
    13·1 answer
  • How are mutations and meiosis similar?
    12·2 answers
  • Choose all that apply. What tools do scientists use to make decisions when employing reasoning skills?
    14·2 answers
  • Why is Baraminology not a perfect system
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!