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worty [1.4K]
1 year ago
14

Mrs. Clark decides to do a demonstration for her class with a piece of notebook paper. Using a balance, Mrs. Clark discovers tha

t the mass of the paper is 20 g. She then takes the piece of paper and cuts it into several small pieces. The cumulative mass of the small pieces is 20 g. What has Mrs. Clark demonstrated for her class
Biology
2 answers:
Rashid [163]1 year ago
8 0
The mass of an object stays the same no matter what you do to it.
amid [387]1 year ago
6 0

a physical change involving change of shape and size of matter


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The blood fluid contains less water, which will cause the water to go into the cells and make them swell up.
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2 years ago
Many plants have leaves and fruits have wax coatings. Some animals also have wax-coated fur or feathers. In which class of biomo
Svetradugi [14.3K]

Answer:

1) Wax belong to lipids.

2) <u>Animals</u>: Water and cold isolation and protection from pathogenic microorganisms.

   <u>Plants</u>: It controls evaporation and maintains hydration.

Explanation:

1) Wax belong to the biomolecules of lipids.

2) In animals, such as birds, the uropygial gland secrets sebum or wax, spreading it throughout the animal's feathers to prevent water from penetrating as it serves as an isolating compound for animals that live in cold areas. It also provides protection from bacteria and fungi. In coloquial terms, it would be like a water-proof coat that protects them from water and extreme climate.

In plants, the secretion of wax through the cuticle has been developed as an adaptation to control evaporation and maintain hydration.

5 0
1 year ago
Inside the lungs air gets warmer and wetter . How else does it change?
Strike441 [17]

the air's oxygen is partially replaced by carbon dioxide. This is because of the gas exchange that occurs so we can live.

7 0
1 year ago
g Indicate true (T) and false (F) statements below regarding cytokinesis in animal cells. Choose the correct answer represented
frozen [14]
<h2>Cytokinesis in animal cells</h2>

Explanation:

  • The force for cytokinesis is generated by kinesin motors on microtubule bundles that form the contractile ring:This statement is false because cytokinesis in animal cells starts with the assembly of contractile ring,contractile band consists of actin and myosin(microfilaments) which catalyse cleavage furrow formation
  • As the contractile ring constricts, its thickness increases to keep a constant volume:This statement is false because thickness remains constant
  • The midbody forms from bundles of actin and myosin: This statement is false because contractile ring forms bundles of actin and myosin whereas midbody is formed from microtubules
  • Local activation of Ran GTPase triggers the assembly and contraction of the contractile ring:This statement is false because local activation of Rho mediates profilin binding to actin and helps in assembly and contraction of contractile ring

The four letter string comes out to be FFFF

6 0
2 years ago
Which cell organelle is most directly involved with the bonding of amino acids?
alexdok [17]

Answer:

d

Explanation:

7 0
2 years ago
Read 2 more answers
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