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katrin [286]
2 years ago
15

PLEASE HELP ASAP!! ( will give brainiest )

Biology
1 answer:
Hunter-Best [27]2 years ago
8 0
<h3>Answer:</h3><h3>brainiest </h3><h3>Explanation:</h3>

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Diffusion is across a semi-permeable membrane. The larger the membrane, the longer the diffusion takes
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A student isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. After adding some D
aivan3 [116]

Answer:

DNA ligase

Explanation:

DNA replication is an enzyme mediated, 3-step process during which the DNA molecule produces a copy of itself. The 3 steps involved are as follows;

  • initiation
  • elongation
  • termination

<em>Initiation </em>involves the unwinding of the double helix structure of the DNA using DNA helicase enzyme

<em>Elongation</em> involves binding of RNA primer to the DNA strands and addition of bases to the primer<em> </em>to elongate the new chains. Bases are added to the leading strand continuously while the lagging strand is replicated in short segments (okazaki segments).

<em>Termination</em> involves the unbinding of RNA primer and substitution of its bases by DNA bases. The Okazaki fragments are then joined together using the DNA ligase enzyme.

<em>The short, numerous segments of DNA observed in the mixture is the Okazaki fragments of the lagging strand. This is due to the absence of the enzyme involved in the joining of these fragments.</em>

Hence, the answer is DNA ligase.

4 0
3 years ago
Ten facts about the cell wall
Gekata [30.6K]
It has 3 layers
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Determine whether each phrase describes a community, ecosystem, habitat, or population.
Yuri [45]

Answer:

A herd of bison - population

Frogs, insects, and birds living near a pond - community

The plants, animals, water, and soil of a forest - ecosystem

The kelp forest where sea otters live - habitat

All the hummingbirds that live in your state - population

Fish, eels, and lobsters living in a coral reef - community

A dying tree with holes that animals live in - habitat

Wetland plants, animals, and marshes - ecosystem

Explanation:

In ecology, the interaction of organisms are classified into categories including population, community, ecosystem etc.

A population in ecology consists of all the members of a particular species that inhabits a particular location. Based on the wide range of examples given in the question, a herd of bison and all the hummingbirds living in my state are examples of a population because they consists of organims of same species (bison and hummingbirds) living in a particular habitat.

A community, as opposed to population consists of organims of different species that share the same location as habitat. According to the question, Frogs, insects, and birds living near a pond and Fish, eels, and lobsters living in a coral reef are examples that represents a community because they contain organims of different species found living in a common habitat.

An ecosystem is the interaction between the biotic components (living) of a community with one another and also with the abiotic components (non-living). Based on the question, The plants, animals, water, and soil of a forest and Wetland plants, animals, and marshes represents an example of ecosystem because they contain living and non-living components interacting together. The living components in the first and second examples are plants, animals while abiotic components are water, soil and marsh.

Habitat refers to the physical location where the population or community of organisms lives. In this question, the kelp forest where sea otters live and a dying tree with holes that animals live in describes habitats of organisms.

5 0
3 years ago
Which factors increase the heat absorbed by a land surface? Select the two correct answers. (1
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Explanation:

7 0
2 years ago
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