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Sphinxa [80]
3 years ago
13

Why miotic spindles form ?

Biology
2 answers:
Kamila [148]3 years ago
8 0

Explanation:

Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

Ilya [14]3 years ago
4 0

Answer: Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

Explanation:

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| Write any two characteristics of drone bee. ​
kvv77 [185]

Answer:

-Drone bees fertilize the queen.

-Their stinger is a modified egg container, so its not actually a stinger!

-Drone bees have half the chromosomes of a female, therefore they have 16.

4 0
2 years ago
Which of the following is not a vascular plant?<br> conifer<br> fern<br> moss<br> flowering plant
scoundrel [369]
The answer is moss.

Mosses are nonvascular seedless plants. <span>Nonvascular plants have simple tissues specialized for internal water transport.</span>
On the other side, vascular plants have vascular tissue which consists of xylem and phloem. Xylem transport water and minerals from the root to the upper parts of the plant. Phloem transports food and nutrients from the leaves, where they are produced, to the growing or storage parts of the plants. 

6 0
3 years ago
Which of the following is least likely to have difficulties with economic access to potable water? a. Zimbabwe b. Australia c. I
qaws [65]

The correct answer is Australia as it has least likely to have difficulties with economic access to potable water.

But the unpalatable fact is that many Australians nonetheless lack get admission to smooth water and powerful sanitation. As an advanced nation, it is probably assumed that Australia will without difficulty meet those new dreams at home – inclusive of aim wide variety 6, to ensure “availability and sustainable control of water and sanitation for all”. But the unpalatable fact is that many Australians nonetheless lack get admission to smooth water and powerful sanitation.

<h3>What is  World Bank’s Development?</h3>

The World Bank’s Development Indicators list Australia as having 100 cesses to smooth water and powerful sanitation. But a dialogue paper we launched the ultimate week with our colleagues outlines how a few far-flung Aboriginal groups war to fulfill Australian water standards.

Hence clear it is that Australia is least likely to have difficulties with economic access to potable water.

To learn more about economic access to potable water refer to the link :

brainly.com/question/1296028

5 0
2 years ago
Select the appropriate word(s) to complete the sentence.
kicyunya [14]

Seedless plants genetically alternate between generations.

<h3>What is the reproduction cycle of seedless plants like?</h3>

All seedless vascular plants have very similar life cycles. As in bryophytes, their life cycle has two alternating generations:

  • the gametophyte
  • and the sporophyte.
  • The sporophyte is always the dominant and free-living generation.

With this information, we can conclude that seedless plants genetically alternate between generations.

Learn more about Seedless plants in brainly.com/question/10715162

#SPJ1

8 0
2 years ago
Many receptor tyrosine kinase pathways have mapk as a downstream signaling component. mapk can phosphorylate target proteins. wh
Lapatulllka [165]

A protein kinase that is specific to the amino acids serine and threonine is known as a mitogen-activated protein kinase (MAPK or MAP kinase; also known as a serine/threonine-specific protein kinase).

<h3>Mitogen-activated protein kinase :</h3>

A small number of cell surface receptors can ultimately generate a large intracellular response due to activation of kinase cascades.

In order to trigger an appropriate physiological response, such as cellular proliferation, differentiation, development, inflammatory reactions, and death in mammalian cells, MAPK pathways relay, amplify, and integrate information from a variety of stimuli.

Tyrosine phosphorylation, specifically numerous tyrosines on each RTK in the dimer, is how cross-linking triggers the tyrosine kinase activity in these RTKs. The term "cross-phosphorylation" refers to this action.

The activation of a MAPKKKK or MAPKKK by stimulation of plasma membrane receptors is the initial stage of signal transduction. The MAPKKK then phosphorylates two serine or threonine residues in the S/T-X5-S/T (X is any amino acid) motif of its activation loop, activating a downstream MAPKK.

Learn more about MAPK here:

brainly.com/question/23449262

SPJ4

3 0
2 years ago
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