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3 years ago

The only phylum in the group Parazoans is ________. A. Porifera B. Cnidaria C. Lophotrochozoa D. Ctenophora E. Ecdysozoa

Biology

1 answer:

ludmilkaskok [199]3 years ago

7 0

Answer:

A. Porifera

Explanation:

Parazoan is a sub-kingdom of animal consisting only of the phylum of sponges (porifera), having two tissue layers only and lacking a nervous system and true digestive cavity.

They have certain characteristics like: sponges are marine, but there are some freshwater sponges that enjoy their water without salt. Most sponges do not have any type of symmetry, but some are radially symmetrical and they come in a variety of shapes, colors, and sizes, they are multicellular, heterotrophic and lack cell walls. Unlike other organisms, sponges lack true tissues and organs.

The mesohyl functions as an endoskeleton in most sponges, and is the only skeleton in soft sponges. This mesohyl is stiffened by mineral spicules, by spongin fibers or both.

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Brut [27]

<u>Some ways to increase carbon dioxide and To reduce carbon dioxide:</u>

WAYS TO INCREASE CARBON DIOXIDE

Consuming electricity: The main reason for the $CO_2$ emission is the burning of fossil fuels. 41% of the $CO_2$ emitted in the US form generating electricity.

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Reuse and recycling: By buying used products and reselling or recycling are reduce your carbon emissions.

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3 years ago

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nataly862011 [7]

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Source credit: </span>https://quizlet.com/16761990/biology-chapter-22-saud-flash-cards/

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3 years ago

Can you please answer this model?

lyudmila [28]

Answer:

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Explanation:

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3 years ago

The brain is an example of which level of organization within an organism

8090 [49]

Answer:an organ

Explanation:

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3 years ago

Whether there is a net flow of fluid into or out of a capillary at a given spot along its length depends on _____.whether or not

castortr0y [4]

Answer: Depends on the balance between blood pressure and osmotic pressure.

Explanation:

The capillaries are part of the microcirculation that transports nutrients to the tissues and removes cell excreta. The walls of the capillaries are extremely thin, constructed of single - layer, highly permeable endothelial cells. Therefore, water, cell nutrients and cell excreta can all interchange quickly and easily between the tissues and the circulating blood.

The tissues of the body is made up of soo many capillaries which helps to deliver blood and it's contents to it. The hydrostatic pressure in the capillaries tends to force fluid and it's dissolved substances through the capillary pores into the interstitial spaces. Conversely, osmotic pressure caused by the plasma proteins( called COLLOID OSMOTIC PRESSURE) tends to cause fluid movement by osmosis from the interstitial spaces into the blood. This osmotic pressure excreted by the plasma proteins normally prevents significant loss of fluid volume from the blood into the interstitial spaces.

Therefore, a balance between hydrostatic pressure in the capillaries which is influenced by blood pressure and osmotic pressure in order for a net flow of fluid into or out of a capillary to occur.

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2 years ago