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
Neko [114]
4 years ago
9

Polytene chromosomes of Drosophila salivary glands each consist of multiple identical DNA strands that are aligned in parallel s

tructures. How could these arise?
Biology
1 answer:
rewona [7]4 years ago
5 0

Answer:

Polytene chromosomes may be defined as the giant chromosomes that contain alternate dark and light bands when view under the microscope. These chromosomes are found in the salivary gland of Drosophila.  

These glands are functionally highly active and contain thousand of DNA strands. These chromosomes are aligned parallel with each other as the replication is normal but the cells are unable to separate and fails to undergo the process of cytokinesis.

You might be interested in
What are gymnosperms?
4vir4ik [10]
A gymnosperm is <span>a plant that has seeds unprotected by an ovary or fruit. Gymnosperms include the conifers, cycads, and ginkgo.</span>
7 0
3 years ago
Read 2 more answers
Some plants increase in height due to changes in specialized regions of cells in the tips of their branches. The processes that
Nookie1986 [14]

Answer:

mitosis, cell growth, and differentiation

Explanation:

There are several ways through which plants grow which may include the process of mitosis mainly that involves cell division. The increase in height in plants is attributed to not only cell division but also growth of the newly formed cell.

Mitosis involved division of cell and in cell growth, cells increase their size that ultimately cause growth of plant height. The highly active growth cells are meristem cells that are found at tips of the plants. They are actively dividing zones of plants and with their division and growth plant increases their heights.

Another mechanism, responsible for increase in height is cell differentiation. Differentiation is the process during which cells are specialized to perform specialized function. For example: Xylem are specialized for transport of water. Phloem are specialized for the transport of food. Similarly, some cells are specialized for growth and they are aimed at increasing in size and division that ultimately increase the plant height.

So, mitosis, cell growth, and differentiation are the mechanisms, that increase plant height due to changes in specialized regions of cells in the tips of their branches.

Hope it helps!

7 0
3 years ago
Which stage represents the climax community
castortr0y [4]

Explanation:

climax community refers to a stable ecosystem in its final stage of ecological succession. Succession is when one community of plants and animals replaces another in an ecosystem. In a climax community, the plants and animals are in balance with each other and their environment.

8 0
2 years ago
Why can´t scientists come up with a single solution to protect all of these areas
Leona [35]

Explanation:

maybe I can help you with other question sorry

3 0
3 years ago
Which two of these characteristics are shared by the planets Uranus and Neptune?
faltersainse [42]

Answer:

 Some of the similarities between the planet Uranus and Neptune are:

  • Both the planets have many similarities in their internal structures.
  • The internal structure of both the planets is made up of water, ammonia gas and methane gas.
  • Both Uranus and Neptune have an Earth- sized solid center.
  • The atmosphere of both the planets comprises of the gases, hydrogen, helium and methane.
  • Due to the presence of methane gas, both the planet Uranus and Neptune have the same blue colour.

8 0
3 years ago
Other questions:
  • Are these correct??????
    14·1 answer
  • True or False. Sound first enters the ear, then passes through the eardrum into the ear, and then passes to the ear where the so
    7·1 answer
  • This holds an organisms hereditary information.
    7·2 answers
  • Why are stars and solar systems separated in the diagram below?
    15·1 answer
  • 20 POINTS - MONOHYBRID CROSS
    14·2 answers
  • How many Genes involved in the production of proteins
    13·1 answer
  • 10.The bacteria that are capable of converting the atmosphere nitrogen into nitrates and nitrites
    5·1 answer
  • In a certain species of plant, flowers occur in three colors: blue, pink, and white. A pure-breeding pink plant is mated with a
    14·1 answer
  • I need help filling in the blink
    12·1 answer
  • Name the chemical that helps in providing the ideal pH for pancreatic amylase to function in the human body.*​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!