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Nostrana [21]
2 years ago
11

Which of the following types of skeletal material is NOT found in at least some sponges?

Biology
1 answer:
Mazyrski [523]2 years ago
8 0

Answer:

b. muscle

Explanation:

The Sponges usually known as Porifera (pore bearers) are aquatic filter feeders. The sponges consist of structural materials (spongin, spicules) which are usually made of calcium carbonate and/or silica. These structures forms their skeletal materials giving their body a thin sheet of cells over a frame (skeleton). As invetebrate and at the unicellular level of organization, Sponges lack muscle.

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To measure the population of lake trout in a 250-hectare lake, 400 individual trout were netted and marked with a fin clip, then
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Answer:

Estimated size is 1600

Explanation:

Given data:

Size of lake is 250 hectares

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Estimated population size = \frac{(marked\ initally \times total\ recaptured)}{mark\ recaptured}

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Answer AND Explanation:

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3 years ago
1. What animals dominated the Mesozoic Era?
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5 0
3 years ago
PLEASE HELP DUE RIGHT NOW!!
sweet [91]

The best answer would be option 3:

Fault Q occurred before layer K was deposited.

If you'd like to know why:

As you can see in the diagram, fault Q does not cross layer K. It stops right under it, so this means that the fault occurred first, then over a span of time, layer K was deposited.

To rule out the rest:

The oldest layer is the one at the bottom so that should be Layer B.

The youngest should be the top-most layer, unless a fault or an intrusion cuts through it, so Layer K is the youngest.

The last option is wrong because fault Q cuts through all those layers, which means it happened after those layers were formed.  

4 0
3 years ago
Read 2 more answers
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