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balandron [24]
2 years ago
10

What is The dichotomous key

Biology
1 answer:
gayaneshka [121]2 years ago
7 0

Answer:

A dichotomous key is an important scientific tool, used to identify different organisms, based the organism’s observable traits. Dichotomous keys consist of a series of statements with two choices in each step that will lead users to the correct identification.

Explanation:

Your welcome! :)

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Most cells of the human body directly receive a variety of endocrine secretions through the activity of which system
bearhunter [10]

Answer: I believe it is D, the Nervous System.

Explanation:

8 0
3 years ago
Eukaryotic cells. Classify each statement according to whether it occurs in eukaryotic cells, prokaryotic cells, or both.
frutty [35]

Answer:

<u>Both</u>:

  • The start codon is often AUG

<u>Eukaryotic cell only:</u>

  • The larger subunit of the ribosome is 60s.
  • The ribosomes initially binds the 5' end of mRNA.

<u>Prokaryotic cell only</u>:

  • The ribosome is 70s
  • Translation occurs in the cytoplasm
  • There are multiple ribosome binding site

Explanation:

  • AUG is the common start codon for both eukaryotic as well prokaryotic cells. In eukaryotic cell, it codes for methionine . While in prokaryotic cell, it codes for formyl methionine.
  • In prokaryotic cell, ribosomes are found in cytoplasm, hence the translation occurs in cytoplasm.
  • Eukaryotic ribosome consists of two subunits; 40s and 60s(larger subunit)
  • Prokaryotic ribosomes have 70s ribososme, which consists of 50s and 20s subuints
  • in eukaryotic cell, 40s ribosome initially binds to the cap at the 5' end of mRNA.
  • Bacterial mRNA contain multiple ribosome binding sites.
8 0
3 years ago
Gravity helps scientists launch spacecraft out of Earth’s atmosphere. truth or false
olasank [31]

True! because without gravity the spacecraft wouldn't go where there wanted it, in the time that they wanted it



4 0
3 years ago
What is a cold air mass ?
kolbaska11 [484]
Colder air masses are temped Polar or Arctic. While warmer air masses are termed Tropical. Continental and Superior air masses are dry while maritime monsoon air masses are moist. Weather fronts separate air ,asses with different density (Temperature and/or Moisture) characteristics.

I Hope This Helped!
5 0
3 years ago
Which of the following channels would not be expected to generate a change in voltage by movement of its substrate across the me
Tcecarenko [31]

Answer:

(a) an aquaporin  

Explanation:

An aquaporin is a water channel which forms a pore in  the cell membrane and facilitates the movement of water. Aquaporin is an integral membrane protein (permanently attached to the membrane) that enables the in and out flow of the water. This channel also prevents the passage of ions and other solutes, so it cannot change the voltage. There are four types of aquaporins, and they are mostly found in the kidney with the function of water reabsorption.

6 0
3 years ago
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