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
zmey [24]
3 years ago
12

Answer this plzz!!!​

Biology
1 answer:
ohaa [14]3 years ago
5 0
I believe your answer is B :)
You might be interested in
What is the relationship between chromosomes spindle fibers and centromeres
Lerok [7]
SPINDLE FIBERS

In Mitosis, Spindle Fibres form at opposite poles of the cell and meet at the equator. Collectively, they form a spindle-shaped structure which attach to Centromeres.

CENTROSOMES

The organelle located near the nucleus in the cytoplasm,
composed of 2 centrioles that divides during S Phase

Centrioles are surrounded by a mass of proteins (Pericentriolar Material (PCM))

Migrates to opposite poles of the cell during mitosis

Involved in the creation of spindle fibres

CHROMOSOMES

A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.

Centromeres
The constricted region joining the two sister chromatids that make up an X-shaped chromosome. It also serves as the point of attachment for spindle fibers when the spindle fibers are pulling the chromosomes toward the centrioles (situated on opposite poles in a cell) prior to cytokinesis.







8 0
3 years ago
Is a straw a good model for showing the malleability of copper?
Oksi-84 [34.3K]
No, it needs to be a metal in order to show the malleability of copper.
8 0
3 years ago
Which is NOT an immune component that can directly attack & destroy target cells?
lara31 [8.8K]

Answer:

Macrophages are part of your innate immune system, which is antigen-independent and does not require activation.

Explanation:

Macrophages phagocytize (internalize) all non-self pathogens it encounters. These do their job without activation. Other cells in the innate immune system include basophils, neutrophils, eosinophils (these cells are polymorphonuclear leukocytes), mast cells, and dendritic cells, which act as the bridge between your innate and adaptive immune system.

All of the other entities listed above are part of your adaptive immune system. The adaptive immune system is antigen-dependent and requires activation. This section of your immune system responds differently to different pathogens, and has the bonus of having immunologic memory, the ability to remember pathogens after infection and respond much quicker upon secondary and tertiary encounters.

Note: All lymphocyte types begin as naïve cells, which then differentiate into their fully matured form upon activation.

Helper T cells are a type of CD4+ T cell that has the job of activating B and T lymphocytes. There are two different types of T helper cells: Th1 and Th2. Th1 cells secrete the cytokine interferon-gamma (IFNγ), and is primarily involved with the stimulation and activation of cytotoxic T cells, while Th2 cells secrete a variety of cytokines and are responsible for activating and assisting with B cells to make antibodies. To make a long story short, Th cells interact with APC (Antigen Presenting Cells), specifically their Class II MHC (a group of genes that present exogenous proteins). The Th cells then proliferate and gain the ability to activate these APC cells and provide the necessary signals to activate B and T cells and make them proliferate and do their specific function.

7 0
3 years ago
Calculate the orbital period of a satellite that orbits two earth radii above the surface of earth​
Lena [83]

Answer:

<u>Depending upon the mass of various bodies and the gap between them, such as planets, satellites, etc., there appears a pulling effect between these massive masses. This pulling effect is known as gravitational force. One can establish the relationship of the orbital period by equating the gravitational force with centripetal force and substituting the velocity relation with the period.</u>

Explanation:

<h3>I hope this helps!</h3>
7 0
2 years ago
What are the most populous and smallest creature on this planet?
docker41 [41]

Answer:

chickens

Explanation:

there are 25.9 billion of them

8 0
2 years ago
Other questions:
  • Name each numbered stage in the plant cell cycle diagram:
    9·1 answer
  • 10. Explain how the scientific process will help you solve problems you encounter in your daily life.
    7·1 answer
  • Identify what structures in a skeletal muscle will shorten in length during contraction of the muscle.
    14·1 answer
  • There are many methods for producers to convert organic (carbon-containing) molecules into something useful
    15·1 answer
  • Large molecules enter the cell by endocytosis and exit the cell by exocytosis. Structure “A” facilitates, or helps, the diffusio
    9·2 answers
  • T/F Osmosis and diffusion are both examples of passive transport.<br> A.True<br> B.False
    8·1 answer
  • 10. Why are algae NOT considered plants?
    10·1 answer
  • Cardinals reproduce sexually. Many types of fungi can reproduce asexually by producing spores. A fungus does not need to _______
    12·2 answers
  • Question 1 (3 points)
    7·1 answer
  • 10)“If Jupiter was not there, there could be more terrestrial planets”. Explain how
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!