1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bess [88]
3 years ago
5

Which of these is a pure substance that cannot be broken down by a chemical reaction?

Biology
1 answer:
Amiraneli [1.4K]3 years ago
5 0

Answer: Element

Explanation: An element is a pure substance that cannot be separated into simpler substances by chemical or physical means.

Each element has unique physical and chemical properties.

Plz mark brainliest:)

You might be interested in
True or false? all the characteristics of life are interrelated
Ede4ka [16]

The awnser is true!! I hope this helped!

3 0
3 years ago
Read 2 more answers
Very rapid (i.e. in 1-2 seconds) responses to maintain normal blood pressure during a sudden decrease in blood volume by hemorrh
Tatiana [17]

Answer:

vasoconstriction of capillaries.

baroreceptors in the aortic arch.

Explanation:

Vasoconstriction of capillaries and baroreceptors in the aortic arch are the two quick responses of body to maintain normal blood pressure during hemorrhage. Vasoconstriction is very necessary for lowering acute blood loss during hemorrhage means escape of blood from a ruptured blood vessel as well as maintain body heat and arterial pressure. The function of baroreceptors is to respond to the change in the tension of the arterial wall when blood pressure changes.

7 0
3 years ago
Paperclip floating on water - What water property is being shown
schepotkina [342]

Answer:

The water property being shown is surface tension

Explanation:

Due to the surface tension, small objects will "float" on the surface of a fluid, as long as the object cannot break through and separate the top layer of water molecules. When an object is on the surface of the fluid, the surface under tension will behave like an elastic membrane.

6 0
3 years ago
Which of the following statements is/are true of long noncoding RNAs? Choose one or more: a. They can trigger the activity of hi
Alinara [238K]

Answer: Options A, B, C and D are correct.

Explanation: They can trigger the activity of histone acetyltransferases.

These RNAs functions by binding to histone-modifying complexes, to DNA binding proteins (including transcription factors), and even to RNA polymerase II.

They can silence genes by promoting the formation of euchromatin by arranging hetero- or euchromatic regions into close proximity may stabilize these domains or it may control the spreading of post-translational modifications (PTMs) to nearest chromatin.

They are actively involved in X chromosome inactivation.

They can regulate the translation and stability of mRNAs.

In Eukaryotic cells RNA transcription is a closely regulated process. Transcription of a lncRNA may regulate the transcription of nearby mRNA genes, either positively (maintaining active chromatin structure) or negatively (for example, colliding polymerases). In these cases, the RNA product may have no importance at all, or it could have an additional function.

8 0
3 years ago
Climate and weather (see image)
NikAS [45]

Answer:Latitude and ocean currents

4 0
2 years ago
Read 2 more answers
Other questions:
  • Approximately how many cells are in the human body
    9·1 answer
  • The XX and XY sex chromosome shape is common to both
    9·2 answers
  • PLEASE HELP ON THESE ITS TIMED<br> WILL GIVE BRAINLIEST AND 30 POINTS
    12·2 answers
  • Which description is an example of a phenotype?
    10·1 answer
  • A 60-year-old obese man was admitted to the hospital for treatment of alcoholism. He has diabetes mellitus. A liver biopsy was p
    13·1 answer
  • Which is a disease caused by a virus<br> aids<br> strep throat
    8·2 answers
  • PLZ HELP!!!!
    5·1 answer
  • Define aggumulation in biology​
    8·2 answers
  • Do you know the names of any of the body parts of a male or female reproductive system?
    9·2 answers
  • What possible effect on the ecosystem will take place if ants are removed?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!