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
victus00 [196]
3 years ago
15

The atmospheric concentration of carbon dioxide increased from 278 ppm in 1790 to 383 ppm in 2007. What is the approximate perce

nt increase in carbon dioxide concentration from 1790 to 2007?
A. 38%B. 505C. 92%D. 105%E. 138%
Biology
1 answer:
Leno4ka [110]3 years ago
6 0

Answer:

<em> A. 38%</em>

Explanation:

Percentage increase in carbon dioxide concentration = (Increase in concentration of carbon dioxide/initial concentration)×100

P = (C₂-C₁/C₁)×100...................... Equation 1

Where P = percentage increase in the concentration of carbon dioxide from 1970 to 2007, C₁ = The atmospheric concentration of carbon dioxide in 1970, C₂ = The atmospheric concentration of carbon dioxide in 2007.

<em>Given: C₁ = 278 ppm, C₂ = 383 ppm.</em>

Substituting these values into equation 1

<em>P = [(383-278)/278]×100</em>

<em> P = (105/278)×100</em>

<em>P = 37.7%</em>

<em>P ≈ 38%</em>

<em>Thus the approximate percentage increase in carbon dioxide concentration from 1790 to 2007 is 38%</em>

<em>The right option is A. 38%</em>

<em />

You might be interested in
Each enzyme produced by the body is A. open—meaning it is able to catalyze a reaction with any molecule. B. specific—meaning it
Vinvika [58]
B. specific - meaning it is only able to catalyze a reaction with a certain molecule
6 0
3 years ago
do members of the same phylum share more characteristics than members of the same class?​ Explain why or why not.
SVEN [57.7K]

Answer: No, they don't.

Explanation:

In the taxonomic rank (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species-- in that order) because phylum comes before class, it means it covers a broader spectrum of organisms. So, the traits are less specific. As you narrow it down, the members of the rank will share more and more traits in common.

Here is an example:

Humans are a member of the phylum chordata. All members of phylum chordata share the same 5 traits at some point in their lifetime. (Some only show the traits when they are embryos/larvae). These 5 characteristics share a tail, a notochord, a single, hollow nerve cord, pharyngeal slits, and an endostyle (thyroid).

So, now that we've established that humans are from phylum chordata, we can narrow it down to what class they are in. Humans are in the class mammalia, meaning they are mammals. All mammals not only share those 5 characteristics of phylum chordata, but they also share characteristics that unite them with each other. They all have hair, mammary glands in females, and are endothermic.

So, while members of the phylum chordata share at least 5 traits, members of the class mammalia share at least 8.

I hope that makes sense!

7 0
3 years ago
Which advancement in technology has increased scientific knowledge of planets other than Earth?
antoniya [11.8K]

I think Is Rovers they helped explore other planets such as mars

3 0
3 years ago
Read 2 more answers
Which behavior was most likely inherited rather than learned?
Semmy [17]

Answer:

D

the rest are all learned

Explanation:

8 0
2 years ago
Read 2 more answers
Which happened during Cenozoic era?
earnstyle [38]
B. is your correct answer.
3 0
3 years ago
Other questions:
  • 45. Which is created by transgenic organisms and utilized by humans?
    6·1 answer
  • Name one disadvantage of light microscopes
    6·2 answers
  • Why mice are classified as omnivores in the food web?
    14·2 answers
  • a geologist is studying rock layers in an old river bed, and he finds a fossil of a fish and a horsetail rush in the same rock l
    11·1 answer
  • Which type of map is most likely to focus on boundaries between countries, states, and counties?
    7·2 answers
  • 3. Which of the following would represent a heterozygous pair of genes?
    12·1 answer
  • ASAP PLZ In three to five sentences, explain why animal cells do not require a cell wall or a central vacuole for their function
    13·1 answer
  • The diagram below shows a certain method of grazing animals
    8·2 answers
  • Provide an adaptive and a nonadaptive hypothesis for the evolutionary loss of useless organs, such as eyes in many cave-dwelling
    11·1 answer
  • Anyone help? im having trouble
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!