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aniked [119]
3 years ago
12

What is the definition of period?

Biology
1 answer:
Digiron [165]3 years ago
7 0
Hmmm I think it’s 1 cycles per second
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The stages of mitosis were originally defined by cellular features observable through a light microscope.
Brrunno [24]

Answer: TRUE

Explanation:

The cell division that takes place during the growth and development of an organism is in an as MITOSIS. Mitosis takes place in somatic cells that is, body cells that are not involved in the production of gametes. The difference stages of mitosis were originally defined by cellular features observable through a LIGHT MICROSCOPE. These stages includes:

--> PROPHASE: when viewed under a light microscope, each chromosome shortens and thickens and is seen to consist of two chromatids. The Centriole begin to separate.

--> METAPHASE: The nuclear membrane disappears, a spindle forms, the chromosomes line up across the middle of the cell and become attached to the spindle fibres at their centromeres.

--> ANAPHASE: The sister chromatids are pulled apart to opposite ends of cell as the spindle fibres contract.

--> TELOPHASE: A nuclear membrane forms around each set of chromatids, and the cell divides into two daughter cells.

4 0
3 years ago
The principle of competitive exclusion states that A. two species cannot coexist in the same habitat. B. competition between two
larisa86 [58]

The principle of competitive exclusion states that two species cannot coexist in the same habitat.

<h3>What is competitive exclusion?</h3>

The competitive exclusion principle, often known as Gause's law, is a theory in ecology that holds that two species competing for the same scarce resource cannot coexist at constant population levels. One species will eventually outnumber all others if it has even a modest edge over the others. This results in the weaker competitor's extinction or an evolutionary or behavioral shift in favor of a different ecological niche. The adage "complete competitors cannot coexist" is a paraphrasing of this idea.

Although he never created it, Georgy Gause is traditionally credited with coming up with the competitive exclusion principle. The natural selection theory put forward by Charles Darwin already incorporates the concept.

The status of the principle has fluctuated during the course of its history between

To learn more about competitive exclusion from the given link:

brainly.com/question/2083056

#SPJ4

5 0
2 years ago
Water is essential for the growth of crop plants. But excessive supply of water should be avoided. Give reason.
Ira Lisetskai [31]

Answer:

Soil can become waterlogged. The water can cut off the air supply to the roots and to the organisms that live in the soil. If the roots do not receive enough oxygen, the plants will die because they rely on oxygen to complete photosynthesis.

Explanation:

7 0
3 years ago
Read 2 more answers
Prophase has a series of checkpoints that determine whether a cell will undergo all stages of mitosis. true or false
Black_prince [1.1K]
The answer is false. All cells that had undergo in the beginning of mitosis, will be undergoing to the whole stages of mitosis. Mitosis is the part of the cell cycle, wherein it results into equally distributed chromosomes and separated two new nuclei. Typically there are five stages of Mitosis.
4 0
3 years ago
A gene is a segment of mrna
Viefleur [7K]

Answer:

An RNA single-stranded molecule that is complementary to one of a gene's DNA strands, to be precise.

Explanation:

DNA sequences or segments code for proteins or molecules with defined functions, called genes.

7 0
3 years ago
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