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
SpyIntel [72]
3 years ago
9

Which of the following is an example of a chemical change?

Biology
1 answer:
jeka57 [31]3 years ago
7 0

Answer:

Baking soda in vinegar

Explanation:

Cause soda is a base and vinegar an acid which will neutralise each other

You might be interested in
Which of the following is TRUE about earthquakes?
Vikki [24]
My answer would be "Earthquakes happen along cracks in the earth's surface, called fault lines, and can be felt over large areas"
3 0
3 years ago
The plaque (microbial biofilm) that forms between your teeth is a highly anaerobic (oxygen-free) environment, even though the mo
slavikrds [6]

Answer: The bacteria uses the oxygen present in the mouth.

Explanation:

The plaque that is formed in the teeth is a highly anaerobic bacteria but it can sustain in the environment rich in oxygen. The oxygen is used by the bacteria and there is a absence of oxygen in the teeth.

It is formed in between the teeth which needs oxygen to survive and if remains for tooth for a longer period of time then it began to grow without oxygen.

It basically uses the oxygen available in the mouth and makes the condition anaerobic.

8 0
3 years ago
The forward and reverse PCR primers used for the amplification of a VNTR locus on chromosome number 4 are 20 bases and 21 bases
zimovet [89]

The repeats which occur together on a chromosome are referred to as VNTR. The length of each repeat is 60bp.

The first primer is 20bp and is 53 bp away from 1st repeat. Therefore, the total length of sequence amplified by the first primer till 1st repeat = 20+53 = 73bp. Beyond this point 6 repeats on 60 bp are present, hence, the length becomes = 73 + (60X6) = 433bp.

Now the reverse primer which is 21bp in length is located 28bp from the repeat on its side. Reverse primer comes from the opposite direction, so it must be present after the 6 repeats.

The total length of the amplified region = 433 + 28 + 21 = 482 bp.

5 0
3 years ago
What term describes the rising and sinking of the lithosphere as material is added or removed?
Margaret [11]
<span>Composition. (We use the crust-mantle-core terminology to describe differences in chemical composition in Earth's interior. We use the lithosphere- asthenosphere terminology to describe differences the physical state and behavior. Note that the boundaries between layers with different compositions do not occur at the same depths as the boundaries between layers with different physical properties. For example, there is a change in composition when passing from crust into mantle. But there is no change in physical state or behavior at this boundary- the uppermost part of the mantle behaves in the same way that the crust does because it is still far enough below its melting temperature to be a rigid, brittle solid. The transition to a softer, more pliable solid occurs further down within the mantle and this change in behavior occurs with no change in composition.)</span>
3 0
3 years ago
How does dispersal help different species? dispersal helps different species to increase their range of places, thereby helping
icang [17]

Dispersal helps different species to increase their range of places, thereby helping to increase their population size in different regions. Dispersal also helps to avoid crowding of diseases of a single location as species move to different locations.

<h3>What is dispersal?</h3>
  • Dispersal is the act of distributing things over a large area. It is when the individuals or seeds move from one site to their growing site.
  • Dispersal can be active (move by oneself) or passive (require dispersers).
  • Seed dispersal is the mechanism of transport of plant seeds to new sites for germination and the establishment of new individuals and colonies.
  • This depends upon the effectiveness of the seed dispersers.
  • Seed dispersal occurs by wind, water, animals, bats, explosions or gravity of the earth.
  • Dispersal of seeds is very important for the survival of plant species.
  • If the plants of same type grow too closely, they have to compete with each other for light, water and nutrients from the soil.
  • Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources.

Learn more about dispersal here:

brainly.com/question/28039336

#SPJ4

4 0
1 year ago
Other questions:
  • Name two ways that mitosis and meiosis are different
    7·2 answers
  • Cells that share a function group together to form organ systems.<br> True or False?
    11·2 answers
  • A 1-month-old infant is being treated with sequential casts for bilateral clubfoot (talipes equinovarus); new casts have just be
    12·1 answer
  • Eubacteria lack a nuclear membrane so nuclear material is found throughout the cell A. True B. False
    12·1 answer
  • What vocab word describes the "frame" being read during protein synthesis that is "shifting"/moving over in a frameshift mutatio
    10·1 answer
  • The cells of a fully grown adult still undergo mitosis. Why is the useful?
    8·1 answer
  • Only about 10 percent of the energy in an organism is passed on to the next level of a food chain. look at this food chain: gras
    8·2 answers
  • What are common changes<br> In an environment?
    10·2 answers
  • What type of material did the water most likely encounter when it stopped?
    14·1 answer
  • A scientist has found fossils of an organism that she suspects is related to a living
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!