Write a short note on oxygen gas

Answer:

alr

Explanation:

Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere

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In 2019, Iceland recorded 7890 births and 123 deaths per week. What was the Population Growth Rate for Iceland?

Why does being hydrophobic make plastic more of a pollution problem

CO2 + H2O à H2O3

Is the above chemical equation balanced? Why or why not?

biological fitness definition

What is meant by ecosystem?





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​

1. What is biodiversity?
a) The animals that live only in rain forests.
b) The rich variety of live organisms in every
ecosystem on Earth.
c) The animals and plants species that live
only in your backyard.

2. Why do we need biodiversity?
a) it provides us with the food we need to eat
b)it provides us with virtually all the things we need to stay alive
c)so we have plenty of trees to use for fuels and materials

3.which of the following places has the highest biodiversity?
a)madagascar &indian ocean islands
b)tropical andes
c)caribbean islands

4. how many biodiversity ‘hotspots’ are there in the world?
a)12
b)25
c)34

5. in these ‘hotspots’ how much of the worlds species are found there?
a)10%
b)25%
c)50%


6. what does ‘endemic’ mean?
a) when a lot of people fall ill
b) when something is only found in one place
c) when a disease spreads throughout the world

7. why is biodiversity under threat?
a) habitat destruction
b)introduction of exotic species
c) both of the above and more


8. what can you do to help save biodiversity?
a) reduce, reuse, recycle
b) plant trees, clean local rivers and parks and protect habitats
c) all of the above

Please help !!! For 10 points

In the scenario above, Red hair (R) is dominant to blonde hair (r). If two parents are
heterozygous for red hair, what percentage of their offspring will have red hair and what
percentage will have blonde?

what is the one thing that makes the different types of light different from one another?

CO2 + H2O + energy --> C6H1202 + O2 , what is this formula for ?

Which of the following describes the relationship between structure and function? The tails on sperm cells help them swim to the egg cell. The heart pumps blood through the body. The skin is made of many different layers​

How small are we in the scale of the universe

the division of the cytoplasm of a eukaryotic cell is called

In which way is cellular respiration similar to photosynthesis?
a. they both make G3P
b. the both involve ATP
c. the they both involve chemiosmosis
d. all of the above

What is the name given to the pair of chromosomes that are the same in
which one comes from the mother and the other comes from the father?

13. What is the relationship between the strength of earthquakes and earthquake
frequency?

Help please:))) I will give u brainlist:))

Edwin Chargaff was a 20th century biochemist who investigated the structure of DNA. Chargaff looked at the ratios of the four bases in the DNA. State the type of bond that joins the bases together in a DNA molecule

The shadow of a tower is always directed toward the North at midday, as shown in the given figure. Where is the
tower located?
A)
North of the Tropic of Cancer or 23°N line
B)
Between the Tropic of Cancer and the Equator
South of the Tropic of Capricorn or 23°S line
D)
Between the Tropic of Capricorn and the Equator

(NEED ASAP!) how does crossing over during meiosis allow for genetic variablity?

Help! Find another text that occurs in the same time period as Hour Of The Bees. It may be a movie, poem. How do the two texts reflect the same time period? Provide textual evidence (evidence from your text) from both texts to support your response.

In what part of the cell does fermentation occur?

Scientists have used genetic engineering to produce new types of grains and vegetables. These grains and vegetables can live in hot temperatures. This research is beneficial to humans because the research...

A. Could eliminate the need of fertilize crops
B. Make crops more resistant to pollutants
C. Show these crops are likely to be infested by insects and other pests
D. Indicates that these crops may grow in hot, dry areas

have you ever heard that a potato is a starchy vegetable? starch is a carbohydrate like the sugars, glucose, sucrose and lactose. how did this plant form the starch that is in the potatoes?

true or false: Galaxies formed straight away after the big bang

This diagram represents the cell cycle. When cells leave the cell cycle, they exit during G1 phase and then enter G0 phase, a resting period. Most normal cells can leave G0 phase and reenter the cell cycle at G1 phase before entering S phase. Cancer cells are different because they cannot enter G0 phase and are likely to do which of the following?
A Fail to complete S phase
B Continuous unregulated cell division
C Mutate during G phase
D Die after completing mitosis

What can form volcanoes as the two plates push apart and magma is able to rise up from the
ground and form new ocean crust?
A
convergent
B
Hot spots
C
Transform plate boundaries
D
Divergent plate boundaries

rate of reproduction to sexual reproduction in plants

How do the nutrients necessary for plant growth get into the soil?
O The soil absorbs sunlight.
Water filters through the soil.
Organic matter is decayed in the soil.
The soil is exposed to air.

Help!!!!!!!!!!!!!!!!!!!