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3 years ago

What are phytoplankton, and how are they affected by the change in seasons?

1 answer:

3 0

Phytoplankton; small cells that use photosynthesis to turn sunlight into food that live near the surface of the ocean. There also responsible for about half of the Earth's primary production. The seasons also affect how well there doing, they need the climate best for them to produce right, changing seasons doesn't nearly affect them as much as climate change though.

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What does the theory of evolution con tribute to conservation biology

Anarel [89]

<span>It helps scientists understand how populations and species react to changes in their environment, and this knowledge can be used to help these populations and species survive.</span>

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3 years ago

A soil profile with labels O, A, B, C. O: top layer. A: second layer. B: third layer. C: bottom layer. Examine the soil profile

Savatey [412]

Label O is organic material, label A is topsoil, label B is subsoil and label C is weathered rock. They represent different soil layers.

<h3>Soil layers</h3>

Soli layers, also called horizons, refer to the different layers observed on the ground.

The topsoil is a layer of soil composed of a mixture of sand, silt, clay and organic material referred to as humus.

Weathering rocks refer to the dissolved rocks and/or minerals on the Earth's surface.

Subsoil refers to the layer under the topsoil on the surface of the ground.

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3 years ago

The y-shaped site at which a double-stranded molecule of dna is separated into two single strands for replication.

aleksandrvk [35]

The Y shaped structure with active region present is called replication fork

The separation of the 2 single strands of DNA creates a ‘Y’ form referred to as a replication ‘fork’. the 2 separated strands will act as templates for making the new strands of DNA.

LEADING STRAND

one of the strands is oriented in the 3’ to 5’ path (toward the replication fork), this is the main strand?. the other strand is oriented inside the 5’ to 3’ direction (away from the replication fork), that is the lagging strand?.

because of their extraordinary orientations, the 2 strands are replicated in a different way: A small piece of RNA called a primer (produced by means of an enzyme referred to as primase) comes along and binds to the end of the leading strand. The primer acts as the place to begin for DNA synthesis.

DNA polymerase? binds to the leading strand after which ‘walks’ alongside it, including new complementary? nucleotide? bases (A, C, G and T) to the strand of DNA within the 5’ to 3’ direction.

This form of replication is referred to as continuous

LAGGING STRAND

Several RNA primers are made by means of the primase enzyme and bind at numerous points alongside the lagging strand.

Chunks of DNA, known as Okazaki fragments, are then introduced to the lagging strand also in the five’ to a few’ path.

This sort of replication is known as discontinuous as the Okazaki fragments will want to be joined up later.

Once all the bases are matched up (A with T, C with G), an enzyme referred to as exonuclease strips away the primer(s). The gaps wherein the primer(s) were are then filled by but extra complementary nucleotides.

The brand new strand is proofread to make sure there are no errors inside the new DNA series.

eventually, an enzyme referred to as DNA ligase? seals up the sequence of DNA into two non-stop double strands.

The end result of DNA replication is two DNA molecules consisting of 1 new and one old chain of nucleotides. That is why DNA replication is described as semi-conservative, 1/2 of the chain is part of the unique DNA molecule, half is ultra-modern.

Following replication the brand new DNA routinely finishes up into a double helix.

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2 years ago

The diagram shows a process taking place between molecules X and Y that provides energy to cells.

IgorC [24]

Answer:

They are ATP and ADP. ....

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3 years ago

What are the components of the dna and rna molecule??

kiruha [24]

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3 years ago

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