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3 years ago

____ are species whose roles have a large effect on the types and abundance of other species in an ecosystem.

2 answers:

8 0

Keystone species are those species whole roles have a large effect on the types and abundance of other species in an ecosystem. For example; pollination of flowering plant species by butterflies, bees, hummingbirds, bats and other species. Top predator keystone species feed on and help regulate the populations of other species and American alligator. Another example;decline of certain shark populations lead to a explosion in populations of rays and skates, which sharks normally feed on. Now rays and skates are feasting on bay scallop fishing business.

Ksju [112]3 years ago

4 0

Keystone species are species whose roles have a large effect on the types and abundance of other species in an ecosystem. Keystone species are important in the ecosystem as they help to determine the whole ecosystem and without them, the ecosystem would be different or stop to be in existence. Almost all animals that have a significant impact on the food webs are examples of keystone species.

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What is the measurement of a population per unit area?

eimsori [14]

<span>Population density (in agriculture: standing stock and standing crop) is a measurement of population per unit area or unit volume; it is a quantity of type number density. It is frequently applied to living organisms, and most of the time to humans.</span>

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3 years ago

__________ is an enzyme that prevents telomeres from degrading by adding more repeating dna to the ends.

Finger [1]

Answer:

Telomerase

Explanation:

Telomerase enzyme catalyze the reaction of maintaining the length of telomeres, preventing it from degradation or shortening by adding guanine rich sequences towards the end of DNA. Telomeres basic function is to maintain and protect our genetic information because every time DNA replicates a short piece of chromosome is lost.

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3 years ago

What is the criteria for polymers and monomers to be organic?

nikklg [1K]

Explanation:

First of all, nylon 6 is only made from one kind of monomer, a monomer called caprolactam. Nylon 6,6 is made from two monomers, adipoyl chloride and hexamethylene diamine

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3 years ago

A maize plant with genotype Aa Bb produces the following gametes 100 Ab 45 AB 106 aB 50 ab This tells us that the two genes are

bogdanovich [222]

Answer:

True

Explanation:

The linkage relation of two genes can be determined on the basis of calculating recombination frequency.

If the recombination frequency value is greater than 50% then the genes are not linked and if the value is less than 50% then the genes are linked.

In the given question, the crossover gametes formed will be Ab = 100

and aB= 106.

Therefore,

$\dfrac{recombinant\ progenies}{ Total\ progeny}\times 100\\\\\dfrac{100 +106}{100+106+45+50}\times 100\\\\=\dfrac{206}{301}\times 100\\\\= 68.43\%$

Since the recombinant frequency value is larger than 50% therefore the genes do not show linkage.

Thus, True is the correct answer.

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3 years ago

Which of the following is an example of an eukaryotic organism?

solong [7]

Just about every living organism on Earth can be placed in one of two classes: prokaryotes and eukaryotes. A prokaryote is a cell without a nucleus and eukaryotes are cells that contain nuclei. There's one quick test to distinguish prokaryotes from eukaryotes: if you can see a single organism, it's a eukaryote.

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3 years ago

____ are species whose roles have a large effect on the types and abundance of other species in an ecosystem.​

____ are species whose roles have a large effect on the types and abundance of other species in an ecosystem.