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3 years ago

Which of the following BEST describes how energy flows in this ecosystem?

Biology

2 answers:

Rina8888 [55]3 years ago

5 0

Answer:

D.) About ten percent of the energy at one trophic level is passed to the next trophic level

irina1246 [14]3 years ago

3 0

Answer:

D. About ten percent of the energy at one trophic level is passed to the next trophic level

Explanation:

In an ecosystem, the amount of energy decreases at each trophic level. Precisely, the energy transfer from lower trophic level ot high trophic level is calculate to be 10% of the previous level. Rest of the energy is just wasted through metabolic activities (e.g. heat). For example, if a grassland ecosystem has total energy of 10,000 Kcal, only 1000 Kcal would be transferred to the primary consumers, and then 100 Kcal to secondary consumers, and finally 10 Kcal to tertiary consumers. See figure for better understanding.

First option is incorrect because energy flow in an ecosystem is unidirectional. Option B and C are incorrect because energy flow is not dependent on specific animal/plant species but rather at trophic levels.

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25. Review the graph below. Blue Jays and Robins do not interbreed. Assuming that both birds live in the same habitat, what woul

kolbaska11 [484]

We do quite often have mutt birds. (the correct name for such a mutt is a hybrid. They are way more common than most people think, but unless you are a birdwatcher you probably wouldn’t even spot them. People often see an odd looking birds and simply think it’s a type they haven’t seen before, when in fact it is a hybrid of two well-known species.

Having said that, for birds to hybridized they have to be fairly closely related to start with. Robins and blue jays are no more closely related than humans are to baboons. You wouldn’t expect a human and a baboon to be able to mate and produce babies would you? So no, robins and blue jays can’t interbreed.

However there are many different species of animal that CAN interbreed and produce offspring. But the different species need to be fairly closely related, far more closely than human and baboon… or a blue jay and a robin.

For example we can interbreed horses and donkeys to produce baby mules, and we can breed cattle and buffalo, or camels and llamas. And the same is true of birds. While blue jays can’t be bred with robins in the wild we quite frequently find mutt birds.

 Ducks are particularly noted for forming wild mutts and many if not all north American mallards for example are of mixed species ancestry.

5 0

3 years ago

Which of the following describes a relationship of commensalism?

yaroslaw [1]

The correct answer is:

B.) A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.

Believe me, I just took the quiz and got the answers back, and I got this wrong because of the answer I got from here was WRONG!!

So happy to help :)

7 0

3 years ago

Read 2 more answers

Trace the path of an egg cell by filling in the blanks.

Nadya [2.5K]

The path of an egg cell: After the egg breaks through the ovarian wall, it travels into the fallopian tube which overlies each ovary. From there, it reaches the uterus or womb. If the egg is fertilized by a sperm cell, it is implanted in the endometrium.

3 0

3 years ago

Read 2 more answers

Babies with very low or very high birth weight are less likely to survive. The graph shows the percentage of babies born at

dalvyx [7]

Answer:

Option C is correct.

The information provided clearly shows that the babies with average weights form a stable selection, the average is favoured.

Stabilizing selection is occurring because the average is favored.

Explanation:

Concluding Part of the question

A graph entitled Percentage of Babies born at Different Weights has weight in pounds on the horizontal axis, and percentage on the vertical axis. A small percentage of babies are born at the low and higher birth weights, and a greater amount are around 7 to 8 pounds.

Which statement is a valid claim that could be made using the data in the graph?

A) Directional selection is occurring because the graph favors an extreme.

B) Disruptive selection is occurring because the two extremes are favored.

C) Stabilizing selection is occurring because the average is favored.

D) Biodiversity variation is occurring because there is an increase in trait variation.

Explanation

Stabilizing selection represents a form of natural selection where the intermediate variants of a trait, that is the non-extreme trait values are the ones that ensure the survival and subsequent formation of stable population of the species with this average traits.

In this question, it is given through the data from the graph that babies with very low or very high weights are less likely to survive.

And it is logical as very low weight babies are most likely to be very weak, fragile and susceptible to being on the wrong side of natural selection and very high weight babies have all sorts of overweight issues plus the fact that they have to literally be squeezed out of the womb through a very narrow canal, really pushing their oversight bodies to its limits very early making them also susceptible to being on the wrong side of natural selection.

The average weight babies on the other hand do not experience any of the issues discussed in the last paragraph, they are usually healthy and thus have a high survival rate. So, it is evident to see that the population of babies stabilizes based on a particular non-extreme trait value (baby weight) through stabilizing selection.

Hope this Helps!!!

8 0

3 years ago

Those who believe that humans have no free will are called _____.

anzhelika [568]

The answer is hard determinists

5 0

3 years ago

Read 2 more answers