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
artcher [175]
4 years ago
13

Near Earth’s surface, ____ occupies about 78% and ____ about 21% of the total volume of dry air. a. hydrogen; oxygen b. nitrogen

; oxygen c. oxygen; hydrogen d. nitrogen; water vapor
Biology
1 answer:
Paraphin [41]4 years ago
6 0

Answer: b.  Nitrogen; Oxygen

Explanation:

The air is a mixture of gases in the following percentage;

Nitrogen; 78%

Oxygen : 21%

Carbon(IV)Oxide : 0.03%

Argon : 0.9%

Others ( minute traces of Neon, Helium, Methane e.t.c) : 0.17%

You might be interested in
Question 2
DIA [1.3K]

mRNA into a protein.each tRNA in the cytosol Carrie a specific amino acid. when the anticodon on the tRNA matches the codon on the mRNA ,the tRNA brings along its amino acid .Amino acid become attached by peptide bonds to form a particular protein molecule

8 0
3 years ago
A. Design a meal that uses four different types of plant foods, two different types
adoni [48]

Answer: Humans are dependent on animal and plant based products for survival.

Explanation:

a. Pizza: My meal is pizza which contains the plant and animal based foods. Plant foods include vegetables like tomato, capsicum, corn, and onion. The two animal based foods used in this will be chicken meat and swine meat. The pizza dough requires yeast to attain a desire puff, yeast here is a fungal strain. The resources required for preparation of pizza are easily available as they are replenishable renewable natural resources. These are available in farm, food market, and butcher shops easily. The plant based foods will grow with the help of seeds and animal based food will be available by breeding in farms.

b. The forest reserves are rich source of renewable natural resources like wood, plant based food, medicines, and other products. If forest reserves are not replenished then the need of these products will increase due to scarcity.

c. Plant: Clothes, furniture, medicines, food, and others.

Animal: Clothes (jute, silk), tools from animal horns, decorative item from elephant ivory

6 0
3 years ago
HELP PLZZZ QUICKThe climate zone closest to the equator is which?
emmasim [6.3K]

Answer:

Tropical

Explanation:

The Earth has three main climate zones: tropical, temperate, and polar. The climate region near the equator with warm air masses is known as tropical.

3 0
3 years ago
Read 2 more answers
In chickens, the allele for feathered legs (F) is dominant over the allele for bare legs (f). In a population of chickens on a f
exis [7]

Answer:

0.5

Explanation:

According to Hardy-Weinberg equilibrium p2+2pq+q2=1 (p+q=1)

p2 is frequency of the dominant homozygous genotype

2pq is the frequency of the heterozygous genotype

q2 is the frequency of the recessive homozygous genotype

In the example above 80 chickens have bare legs (ff)-recessive homozygous which means that the frequency of that genotype is 80/240+80=0.25 (q2), frequency of the recessive allele is\sqrt{0.25}=0.5. This means that the frequency of the dominant allele (p) is 1-0.5=0.5

So, the frequency of the heterozygous genotype (2pq) is 2*0.5*0.5=0.5

The frequency of the dominant homozygous genotype is p2=0.25

7 0
4 years ago
The Michaelis-Menten and the Lineweaver-Burk plots can be used to determine the Km and Vmax of the enzyme-catalysed reaction. Ex
NNADVOKAT [17]

Answer:

gsjzvapdjssooqqwiwow epw w wysemevehejeowkkwjwkwknsd d

7 0
3 years ago
Other questions:
  • In the mouse, gene B can produce black pigment from a colorless precursor molecule. A mouse having at least one B allele can pro
    12·2 answers
  • Which of the following best describes the Influence of latitude on climate
    9·1 answer
  • Whats the salient of desert the organism known too- causie the disease?
    5·1 answer
  • Question 7 of 20 a 4-year-old girl with a urinary tract infection is scheduled to have a voiding cystourethrogram. when preparin
    14·1 answer
  • How does random fertilization add to genetic variation?
    12·1 answer
  • What does o stand for in the equipment nose which imitates the human nose?
    9·1 answer
  • I really am having trouble understanding cellular respiration. I mostly understand the parts and the steps but I'm not sure how
    5·2 answers
  • In an experiment, the enzyme lactase is added to milk in a test tube. The products obtained are glucose and galactose. Which of
    10·2 answers
  • 2. Explain the relationship between genetic variation and an organism's ability to adapt to its environment,​
    10·1 answer
  • I'll give the brainiest. Which type of human activity has a significant impact on Earth’s climate?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!