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
adelina 88 [10]
3 years ago
6

30POINTS AND BRAINLEST

Biology
1 answer:
SCORPION-xisa [38]3 years ago
5 0

Answer:

We are losing Earth's greatest biological treasures just as we are beginning to appreciate their true value. Rainforests once covered 14% of the earth's land surface; now they cover a mere 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.

One and one-half acres of rainforest are lost every second with tragic consequences for both developing and industrial countries.

Rainforests are being destroyed because the value of rainforest land is perceived as only the value of its timber by short-sighted governments, multi-national logging companies, and land owners.

Nearly half of the world's species of plants, animals and microorganisms will be destroyed or severely threatened over the next quarter century due to rainforest deforestation.

Experts estimates that we are losing 137 plant, animal and insect species every single day due to rainforest deforestation. That equates to 50,000 species a year. As the rainforest species disappear, so do many possible cures for life-threatening diseases. Currently, 121 prescription drugs sold worldwide come from plant-derived sources. While 25% of Western pharmaceuticals are derived from rainforest ingredients, less that 1% of these tropical trees and plants have been tested by scientists.

Most rainforests are cleared by chainsaws, bulldozers and fires for its timber value and then are followed by farming and ranching operations, even by world giants like Mitsubishi Corporation, Georgia Pacific, Texaco and Unocal.

There were an estimated ten million Indians living in the Amazonian Rainforest five centuries ago. Today there are less than 200,000.

In Brazil alone, European colonists have destroyed more than 90 indigenous tribes since the 1900's. With them have gone centuries of accumulated knowledge of the medicinal value of rainforest species. As their homelands continue to be destroyed by deforestation, rainforest peoples are also disappearing.

Most medicine men and shamans remaining in the Rainforests today are 70 years old or more. Each time a rainforest medicine man dies, it is as if a library has burned down.

When a medicine man dies without passing his arts on to the next generation, the tribe and the world loses thousands of years of irreplaceable knowledge about medicinal plants.

Explanation:

You might be interested in
Carrying capacity is _____.
ser-zykov [4K]
The amount of stuff that an ecosystem
5 0
4 years ago
Which kind of compound increases the hydrogen ion concentration in a solution?
cupoosta [38]
Hi,
I think the answer you are looking for is “acid compound”.

I hope this helps. If you’d like further explanation please let me know. Also, English is not my first language, so I’m sorry for any mistakes.
3 0
3 years ago
The Arctic tundra has wetlands caused by _____.
Ad libitum [116K]

Answer:

B.soil that is frozen solid all year

C.summer thaws combined with frozen permafrost

D.the overflow of a large lake each summer

6 0
3 years ago
At 20°C the enzyme that catalyzes the breakdown of polysaccharides functions at 1 reaction every 20 microseconds. If this enzyme
lora16 [44]

Answer:

Seven segments

Explanation:

As given in the question -  

After every  twenty microseconds one reaction occurs i.e breakdown of polysaccharides.  

This means that after every  twenty microseconds the polysaccharides is broken down  

The total time for this hydrolysis reaction is  120 micro seconds

Thus , there will be six phases of division each after every  twenty microseconds

After 1st  twenty microseconds , total segments is equal to two

After 2nd  twenty microseconds , total segments is equal to three

After 3rd  twenty microseconds , total segments is equal to four

After 4th twenty  microseconds , total segments is equal to five

After 5th twenty  microseconds , total segments is equal to six

After 6th twenty microseconds , total segments is equal to seven

4 0
4 years ago
How do regulatory proteins of the cell cycle help maintain homeostasis? the regulatory proteins control the cycle by signaling t
emmainna [20.7K]
I think the correct answer from the choices listed above is the first option. Regulatory proteins of the cell cycle help maintain homeostasis by controlling <span>the cycle by signaling the cell to either or delay the next phase of the cycle. Hope this answers the question.</span> 
3 0
3 years ago
Read 2 more answers
Other questions:
  • The nutrient found most abundantly in both the human body and in foods is what
    13·1 answer
  • Mitotic cell division is initiated in the ?
    11·1 answer
  • Select all the kingdoms that are composed of eukaryotes.
    9·1 answer
  • What is a ‘control’ in an experiment
    10·2 answers
  • What bacteria causes milk to spoil?
    7·2 answers
  • The nurse is teaching the client newly diagnosed with systemic lupus erythematous about the condition. Which statement by the cl
    14·1 answer
  • Whats the answer please???
    11·1 answer
  • In an earthworm is the dorsal blood vessel or the ventral blood vessel larger?
    13·1 answer
  • What is a gene mutation or point<br> mutation?
    9·1 answer
  • 1. A piece of pure gold (Au) has a volume of 50 cmWhat is its mass?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!