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AleksAgata [21]
3 years ago
8

Describe an ecosystem and identify the different trophic levels.

Biology
1 answer:
77julia77 [94]3 years ago
6 0
An ecosystem is a closed system consisting of living and non-living things.

Trophic Level 1: Primary Producer
Trophic Level 2: Primary Consumer
Trophic Level 3: Secondary Consumer
Trophic Level 4: Tertiary Consumer
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What is digestive syestem
-Dominant- [34]

Explanation:

Hey there!!!

The group of organs working together to bring a complex substances to simpler substances called digestive system.

It includes various organs, such as, mouth, stomach, small intestine, large intestine, etc.

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em>

3 0
4 years ago
Help please !! I really don’t understand this much☹️
morpeh [17]
Ok, so I wrote these out just to make it a little bit easier for you to understand what I am about to explain.

So for the first one you have two different traits that can be inherited- having freckles or having no freckles, F and f respectively. The dominant trait (or having freckles) is shown by the capital F, and is almost always expressed over the recessive trait, or the lowercase f. So, for example, if you have a genotype of Ff, the trait having freckles will show up instead of not having freckles. The only way that you could have the trait of no freckles show up is if there are two recessive alleles for having no freckles, or ff. In this case, you have two parents who are both heterozygous for the trait of having freckles, so in other words the mother has Ff and the father has Ff. Each parent passes down one allele to the offspring, so since you are breeding Ff and Ff, you should result in having the possible genotypes of FF, Ff, Ff, and ff. This means that there is a 25% chance that the offspring will be homozygous for having freckles, a 50% chance that the offspring will be heterozygous for having freckles and a 25% chance that they would be homozygous for having no freckles, or a 1:2:1 ratio.

Incomplete dominance is a little bit different that just a normal monohybrid cross. Instead of just the dominant gene showing up in a heterozygous genotype, both traits show up. So like the question says, if a homozygous red flower plant was crossed with a homozygous white flower plant, their offspring would not just be white or red, they would be pink because it is a mixture of white and red. So then if you crossed the heterozygous, or Rr plants, the result would be a 25% chance of getting a homozygous RR red plant, a 50% chance of getting a pink Rr plant, and a 25% chance of getting a white rr plant, or another 1:2:1 ratio.

Sorry for the wordy answer, but hopefully this helps you understand this a little better :)

4 0
4 years ago
An estuary that normally shelters juvenile fish and other organisms has become filled with silt and pollution. How will this aff
grin007 [14]
There will be less young organisms and way more older ones - this will put the population into decline
5 0
3 years ago
Large blue whales that are up to 30 meters long live primarily on ________ that is/are only about 6 cm long.
zalisa [80]

Large blue whales that are up to 30 meters long live primarily on krill that is/are only about 6 cm long.

Blue whales belong to the class of mammals. They are the largest animals on the Earth. They live in marine habitat. They can be more than 100 feet long. The weight of a single whale can be equal to 30 elephants. And they can live for as long as 80-90 years.

Krill are small animals belonging to the class of crustaceans. They are present in oceans. Krill are actually zooplanktons. They are majorly the food of whales. Krill are filter-feeders.

To know more about blue whales, here

brainly.com/question/14803609

#SPJ4

7 0
2 years ago
What type of things demand energy in our lives
andriy [413]
Heating and cooling our homes, lighting office buildings, driving cars and moving freight
8 0
3 years ago
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