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Vikki [24]
4 years ago
7

Human beings have described many of the animals they have encountered on earth. Roughly what portion of the animals that have be

en described are insects?
Biology
1 answer:
zloy xaker [14]4 years ago
3 0

Answer:

Eighty percent

Explanation:

  • Insects have jointed legs, segmented bodies and exoskeletons.
  • Insects are most documented and recognized species on earth. They are also the most diverse group of organism. There are around 900 thousand of insects living on Earth, it is almost eighty percent of all the known species.  
  • Insects belong to the class of phylum Arthropoda
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bekas [8.4K]

Answer:

tiene divisiones

Explanation:

The mitosis division process has several steps or phases of the cell cycle - interphase, prophase, Prometaphase, metaphase, anaphase, telophase and cytokinesis - to create the new diploid cells successfully. The cell mitosis cycle includes several phases that

4 0
3 years ago
23. A PCR reaction is performed, and the negative control demonstrates the presence of a detectable number of PCR product (ampli
Gre4nikov [31]

Answer:

Contamination of the control sample (negative control) with DNA

Explanation:

The Polymerase Chain Reaction (PCR) is a technique widely used in molecular biology laboratories to amplify a target DNA fragment using primer pairs and DNA polymerase. In PCR experiments, it is imperative to include both positive and negative controls. The positive control refers to the amplification of a PCR product (amplicon) of known molecular size during PCR reaction in order to ensure the correct molecular weight of the target DNA fragment. The negative control refers to the inclusion of a sample without DNA in order to ensure that no contamination with DNA has occurred in the other samples.

6 0
3 years ago
For fertilization to occur in humans, only one sperm is needed to weaken the barrier that surrounds the egg.
photoshop1234 [79]

Answer:

False

Explanation:

Approximately 200 out of 200 million sperms ejaculated during intercourse reach the general vicinity of the egg.  They sperms must undergo capacitation during which dilute inhibitory factors fluids of the female reproductive tract weaken the membrane of the sperm head so that head of the sperm can be broken easily when it came in contact with the egg.

The first sperm to reach an egg isn’t the one to fertilize it because the egg is surrounded by a gelatinous membrane called the zona pellucida. Outside this layer, a layer of small granulosa cells also present.

Therefore, it requires numerous sperm to clear a path through these barriers before one of them can penetrate the egg and fertilize it.

8 0
4 years ago
Need help on how to start my paragraph
posledela
OK well first of all I hate biology but I like writing so you can use :: The molecular reactions of cellular respiration transform Krebs cycle into the more readily available bond energy of ATP.
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OverLord2011 [107]

The answer is higher survival rate

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3 years ago
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