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Semenov [28]
4 years ago
8

Competition between two species occurs when?

Biology
1 answer:
4vir4ik [10]4 years ago
3 0

Answer:

Competition occurs when two organisms fight over a resource that they need. It is a negative/negative reaction. They also compete for mates. If resources are scarce the two species will fight over the resources for their own survival.

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only about 10 percent of the energy in a trophic level is available to organisms at the next trophic level
Digiron [165]
True, each trophic level gives only 10% of their energy/calories to the next level.

4 0
3 years ago
What are the three general processes that take place in meiosis
coldgirl [10]

Answer:

Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells.

Explanation:

Basically there are four processes that takes place under "MEIOSIS". And they are :

  • Prophase
  • Metaphase
  • Anaphase
  • Telophase

Prophase:

In prophase, chromosomes become visible and crossing-over occurs, then nucleolus disappears and the meiotic spindle forms, then the nuclear envelope disappears.The duplicated homologous chromosomes pair, and crossing-over (the physical exchange of chromosome parts) occurs.

Metaphase:

Metaphase process that separates duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During metaphase, the cell's chromosomes align themselves in the middle of the cell.

Anaphase:

Anaphase I begins when the two chromosomes of each bivalent separate and start moving toward opposite poles of the cell as a result of the action of the spindle.

Telophase:

In telophase a homologous chromosome pairs reach the poles of the cell, nuclear envelopes form around them, and cytokinesis follows to produce two cells. After cytokinesis, each of the two progeny cells has a nucleus with a haploid set of replicated chromosomes.

6 0
4 years ago
The segments of a tapeworm consisting primarily of eggs, which hang in bags as a long chain behind the head, are called scolexes
makkiz [27]

The answer is proglottids.

When tapeworm infect the intestine, it will attach a segment that consist of a part with many eggs called proglottids. The proglottids will constantly produce eggs. If the worm is removed but some of the proglottid leave behind, the infection would be recur, so it is important to remove all proglottid

3 0
4 years ago
How does the density of the block change when you adjust the volume?
Nata [24]

Answer:

You take some of the mass away while adjusting the block and also because your hands add extra weight

Explanation:

4 0
3 years ago
Explain the role of air pressure, air masses and weather fronts in the formation of meteorological events such as thunderstorms,
frozen [14]

The best I have is that the cold air is at the bottom and the warm air is at the top.

7 0
3 years ago
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