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Elena L [17]
3 years ago
12

Phytoplankton form the base of food webs, but are only present in the upper few hundred meters of the ocean. A number of factors

here can limit their growth and hence limit the amount of biomass in higher trophic levels.
Which of the items below is not one of these limiting factors to phytoplankton?

a. Nitrogen

b. Light

c. Phosphate

d. Oxygen
Biology
1 answer:
Ksenya-84 [330]3 years ago
6 0

Answer:

The correct answer is d. Oxygen

Explanation:

Phytoplanktons are responsible for the fixation of approximately half of the global carbon therefore seawater has high CO2 concentration which is required by phytoplanktons to make their food.  

They are the primary producers of oceans and they are responsible to support the food chain of oceans. Factors that can limit their growth are mainly sunlight and nutrients like phosphorus, nitrogen, etc.

As phytoplanktons are photosynthetic they release oxygen itself as a byproduct therefore oxygen is not a limiting factor to phytoplanktons. So the right answer is d.

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❥SCIENCE SUBJECT
Fiesta28 [93]

9514 1404 393

Answer:

  • time: 1.122 seconds
  • range: 10.693 m
  • maximum height: 1.543 m

Explanation:

<u>Given</u>:

  runner is launched at 30° angle to horizontal at 11 m/s

  acceleration due to gravity is g = -9.8 m/s²

<u>Find</u>:

  runner's hang time

  runner's distance to the landing point

  runner's maximum height

<u>Solution</u>:

The (horizontal, vertical) speed components will be ...

  (11 m/s)(cos(30°), sin(30°)) = (5.5√3 m/s, 5.5 m/s)

The time of flight can be found from the height formula:

  h(t) = 1/2gt² +vt . . . . . . where v is the vertical speed at launch

The time we're concerned with is the time when h(t)=0 and t>0.

  0 = -4.9t^2 +5.5√3t = t(-4.9t +5.5√3)

The second factor is zero when ...

  t = (5.5√3)/4.9 ≈ 1.122 . . . seconds hang time

__

The distance to the landing point will be the product of horizontal speed and hang time:

  d = (5.5 m/s)(5.5√3/4.9 s) ≈ 10.693 m . . . . distance to landing

__

The maximum height can be found from the formula (based on conversion of kinetic energy to potential energy) ...

  h = v²/|2g| = (5.5 m/s)²/(2(9.8 m/s²)) ≈ 1.543 m . . . . maximum height

4 0
2 years ago
Evaluate the image below and discuss the information portrayed in Graph A, B and C
nataly862011 [7]

In A and B we see the number of phenotypes that can be found, in a case of polygenic inheritance, depends on the number of allele pairs involved

<h3>Genetic distance</h3>

The knowledge of the genetic distance between genotypes of a population of interest is important for a breeding program, as it allows the organization of germplasm and a more efficient sampling of genotypes.

<h3>Gaussian</h3>

The normal distribution is a very useful model in statistics, and it would not come as a surprise as the sum of independent effects (or not very correlated effects) should, if there were many of them, normally distribute (always subject to certain assumptions).

With this information we can conclude that in graph <u>A</u> we see a higher frequency of medium-sized individuals, showing zygosity, and in <u>B</u>, <u>heterozygosity</u>.

Learn more Phenotypes about in brainly.com/question/20730322

7 0
2 years ago
How do you think the Law of Universal Gravitation State connects why apples fall down and planets circle in orbit?
Leviafan [203]
Apples are drawn to a massive object, like the earth, and fall down under a gravitational constant. On the other hand, planets revolve around a more massive object under the same premise. It’s the same idea, just one follows a linear path, and the other has a uniform circular motion path because other forces are acting on it. In other words, the planets ARE still falling, but the sun is also pulled by them so they just keep dancing.
6 0
3 years ago
5. Galileo used a(n) that had a lens to bend light.
Kruka [31]

Answer:

v,n v.mnkhj fkhlkfmnj lkmn weol,fgkmj j hwejfq3

Explanation:

kjbdonlfjkh gbfvwef,lknojb gflwj nf

5 0
2 years ago
Read 2 more answers
Which process of cell division results in more diverse off spring? ​
andrey2020 [161]

Explanation:

Its Meiosis because it allows the offspring produced during sexual reproduction to grow and develop. B) Meiosis joins together the sex cells during sexual reproduction to produce new offspring. I cant see your anwers to tell you whichit it so i hope this helps you.

5 0
3 years ago
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