All categories

4 years ago

‏is it true that all ecosystems must be as large as a desert? explain

Biology

1 answer:

snow_lady [41]4 years ago

4 0

Answer: No

Explanation: The major parts of an ecosystem are: water, water temperature, plants, animals, air, light and soil.

You might be interested in

The two coiled up strands of DNA within a chromosome are called

arsen [322]

It’s called histone

5 0

3 years ago

A 20-pound object is dropped from a 50-foot bridge onto the ground below it. A 50-pound object is dropped from a 100-foot cliff

ira [324]

The 50 pound object will reach the ground first.

Explanation:

Using the second equation of motion, we can derive the time taken for each of the object to reach the ground. As the object is thrown from the top of the bridge or cliff, acceleration due to gravity will be acting on them.

So, $s = ut+\frac{1}{2} at^{2}$

The value of s for the object thrown from 50 foot bridge is given as 50 ft. The initial velocity of the object will be zero. The acceleration can be written as the ratio of mass to gravitational force.

Then, $s = (0) t +\frac{1}{2}*\frac{m}{F}*t^{2}$

$50 = \frac{20}{2F} t^{2} \\\\t^{2} = \frac{100F}{20}$

$t = \sqrt{5F}$

Then, consider the time taken for the 50 pound object to reach the bottom of 100 ft cliff as t₁ and the displacement in this case is 100 ft.

Then, $100 = (0)t +\frac{1}{2}*\frac{50}{F}*t_{1}^{2} \\\\t_{1}^{2} =\frac{200F}{50}$

$t_{1} = 2 \sqrt{F}$

Since, the gravitational force acting on both the objects will be same, the ratio of time taken is

$\frac{t }{t_{1} }=\frac{\sqrt{5F} }{2\sqrt{F}} = \frac{\sqrt{5} }{2}$

So, the time taken for the 20 pound object to reach the ground of 50 ft bridge is √5 s =2.236 s and the time taken for the 50 pound object to reach the ground of 100 ft cliff is 2 s.

Thus, the 50 pound object will reach the ground first.

5 0

3 years ago

What type of gland in the skin produces sweat?

zimovet [89]

The gland that produces sweat is eccrine

8 0

3 years ago

Briefly explain what clues to look for to tell if a cell is in each of the following phases of mitosis:

k0ka [10]

Answer:prophase----the chromosomes shorten and thicken.the nuclear membrane has open up and the nucleolus has disappeared

Metaphase----the chromosomes migrate to the central plane of the cell and attach to the spindle fibres microtubules

Anaphase---the chromatids of each chromosomes part and move towards opposite poles of the spindle as the spindle fibres shorten

Telophase----the chromatids are in the polar end of the spindle .the spindle breaks down,the centrioles replicate,the nuclear membrane is reformed,the chromosomes gradually uncoil.

Explanation:

6 0

4 years ago

Please can someone help me please!!!!

nikitadnepr [17]

Answer:

i doont know

Explanation:

6 0

3 years ago