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
Alinara [238K]
2 years ago
13

What makes up 21 percent of the earths atmosphere

Biology
2 answers:
Nady [450]2 years ago
8 0
21% oxygen.................................
never [62]2 years ago
6 0
  the answer is 21<span>% oxygen, </span>
You might be interested in
ll of the following are functions of the muscular system except: produce heat. movement. maintain posture. hemopoiesis.
Margarita [4]
He photos I photo him his her blue eyes green purple grey brown grey hair strips
8 0
2 years ago
Which organelles allow plants to support heavy structures such as leaves and flowers?
son4ous [18]

Answer:

I believe the answer is C

Explanation:

In many plant cells there is a single large central vacuole filled with liquid, pressure of the central vacuole allows plants to support heavy structures such as leaves and flowers.

8 0
2 years ago
Read 2 more answers
Match the following.
iris [78.8K]
<span>AUTOTROPH 1. an organism that can make its own food

Plants like algae are autotrophs. They produce their own food with the use of light, carbon dioxide, water, and other chemicals that are vital in their food producing activity. Aside from plants, there are autotroph organisms. An example of this is phytoplanktons. 

CALVIN CYCLE 2. the dark reaction process of photosynthesis that uses carbon dioxide for the synthesis of carbohydrates

The Calvin Cycle has three phases. These are 1) carbon fixation, 2) reduction reactions, and 3) RuBP regeneration. 
This cycle occurs in the stroma of the chloroplast and it converts carbon dioxide and other chemical compounds into glucose.

CAROTENOID PIGMENT 3. a pigment ranging in color from yellow to red; helpful in capturing the Sun's light energy for use in photosynthesis

Carotenoid is a plant pigment. It produces yellow, orange, and red colors of many fruits and vegetables. Carotenoid pigment is identified as a class of phytonutrients that benefits human health. People who consumes carotenoid rich fruits and vegetables enjoys the antioxidant property of the food as well as the Vitamin A that some carotenoid convert into. 

CHLOROPHYLL 4. a green pigment in plants that serves to trap the Sun's energy for photosynthesis

Chlorophyll is the combination of two Greek words "chloros" and "phyllon" which means green and leaf respectively. This pigment also contributes to human wellness as consumption of plants rich in chlorophyll are proven to be very healthy. These health benefits are 1) helps fight cancer, 2) improves liver detoxification, 3) speeds up the healing of wounds, 4) improves digestion and helps control weight, and 5) protects skin from skin virus like cold sores.

CHLOROPLAST 5. the tiny body that contains chlorophyll; part of the cell in which photosynthesis takes place

Chloroplast is a type of plastid that can be distinguished from other plastids due to its green color. Chloroplast is the only plastid that contains chlorophylls a and b, thus its green color. 

PHOTOSYNTHESIS 6. a process that involves the use of carbon dioxide and water in the production of glucose and oxygen using the Sun's energy

RADIATION 7. transfer of heat or energy through rays of various wavelengths

</span><span>Radiation is defined as energy travelling through space. Sunshine or sunlight is an example of radiation. Its ultra violet rays radiates heat on the earths' surface which in turn helps our autotrophs undergo photosynthesis.
</span>
3 0
3 years ago
Read 2 more answers
What is another name for haploid and diploid cells?
vladimir1956 [14]
Haploid and diploid cells are also called <span>gametes.

</span>
5 0
3 years ago
Read 2 more answers
To compute inspiratory reserve volume (irv), one would need to know ________.
BabaBlast [244]
To compute inpiratory reserve volume (irv), one would need to know and it is: IRV = VC - (TV+ERV)
Inspiratory reserve volume is the maximal amount or more air that can be drawn into the lungs by determine effort after normal inspiration - assimilate expiratory reserve volume.
6 0
3 years ago
Other questions:
  • How is energy obtained by ingested foods in cellular respiration?
    7·1 answer
  • How does the gray whale fit into the food web?
    7·1 answer
  • Drag the tiles to the correct boxes to the complete pairs identify the types of inheritance based on the expression of alleles i
    12·1 answer
  • Even though ntlers eventu lly h rden nd f ll off, wh t is the best evidence th t ntlers re living p rt of deer? A. They perform
    11·1 answer
  • What are wetlands?
    10·1 answer
  • Geothermal energy is an alternative energy source. However, it is not resourceful enough to replace more than a minor amount of
    7·1 answer
  • 1. List and describe the four components of blood:
    11·2 answers
  • What would the number 35.8 be, expressed in scientific notation?
    6·1 answer
  • Two morphologically identical Drosophila populations live in Lower Nahal Oren, Mount Carmel, Israel. There are two slopes of a v
    5·1 answer
  • Which characteristic belongs in the area marked X?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!