How many ways can you choose ten tadpoles from a pool of 20?

Biology

1 answer:

mestny [16]3 years ago

5 0

What do you mean but if you mean what I think you mean then you take half of the tadpoles

You might be interested in

Do all toxic substances in the environment bioaccumulate

Degger [83]

Answer:

it cannot be easily degraded in our environment.Like humans, animals and plants are exposed to PBTs in the environment through air, water and food. ... Persistent bioaccumulative toxic substances (PBTs) are chemicals that do not degrade easily in the environment.

6 0

3 years ago

*Fill in the blank*

Gekata [30.6K]

The noncyclic pathway is a FLOW of electrons from water, to photosystem II, to PHOTOSYSTEM I to NADPH. Energy is released as ELECTRONS move through the first electron transfer chain. This energy pumps HYDROGEN IONS into the thylakoid compartment, and then they power the formation of ATP as they flow back out. Sunlight provides the energy needed to keep this cycle going.

----------------------------------------------------------------------------------------------------

Luminous energy is trapped by chlorophyll in Photosystem II.
When the pigment molecules absorb light, electrons provided by water molecules get in a higher energy level.
The excited electrons go through the electron transport chain from Photosystem II to a less energetic level in photosystem I.
<em>When the excited electrons leave photosystem II, they are replaced by new electrons extracted from the water molecules. </em>
Luminous energy absorbed move the electrons from the photosystem I to another electron acceptor, from where they get transported again and used to produce NADPH molecules.
<em>When electrons leave Photosystem I, they are replaced by new electrons coming from photosystem II. </em>
When the water molecule breaks down, hydrogen ions remain in the thylakoid lumen, from where they are pumped to the stroma by the ATP synthase.
The released energy is used to produce ATP molecules.
Hydrogen ions go back from the stroma to the thylakoid compartment.

The final products are oxygen, ATP, and NADPH.

--------------------------------------------

8 0

2 years ago

What is the term for the percentage of light reflected by something?

monitta

the term is albedo i think sorry if it is not correct

5 0

3 years ago

Read 2 more answers

Question 4....??? What effect can bottleneck events have on population that have nearly become extinct????

ArbitrLikvidat [17]

The answer is; D

It reduces the diversity of the population because some variations in the population can be completely eliminated by the bottleneck effect. Even if the population recovers in population size, the genetic variation will have reduced as compared to the initial population before the bottleneck. For a mall population, this effect can be grave because the reduced genetic variation may mean that the population may be unable to adapt to new selection pressures hence may go extinct.

5 0

2 years ago

Producers are usually the first organisms listed in a food chain. They provide energy to the other organisms in the food chain.

Sliva [168]

Hi!

The answer is C. The Sun

The energy that producers get from the sun, along with water, allows them to begin photosynthesis, the process in which they make their food, because they are not able to absorb other forms of energy because they are plants.

I hope this helps!!

5 0

2 years ago