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PtichkaEL [24]
3 years ago
8

What are two features all echinoderms have?

Biology
1 answer:
12345 [234]3 years ago
7 0
The have tube feet and and they have no organs or eyes
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What does the arrow in the food web represent?
dedylja [7]

Answer:

This represent the flow of energy.

lil more info:

The placement of the arrows in a food chain or food web is very important. The arrows always show the direction of the energy as it is transferred from one organism to another. The flow of energy can also be represented within an energy pyramid.

6 0
2 years ago
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calculate the quantity of electrical energy used by an electrical bulb rated 60 Walt's used for 2hours​
ivanzaharov [21]

Answer:

0.12KWH

Explanation:

Time: 2hrs

Power: 60watt

60/1000

Formula: Energy=potential/time

0.06×2= 0.12KWH

6 0
2 years ago
Within the cell's endoplasmic reticulum, the proteins are packed into membranebound sacks called ____?
sweet [91]
Within the cell's endoplasmic reticulum, the proteins are packed into membranebound sacks called lyosomes?
5 0
2 years ago
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Like all cells, the neurons' internal organization dictates its function. Neurons have relatively many mitochondria, an extensiv
4vir4ik [10]

Answer:

Neurons have stable, relatively unchanging internal environments.

Explanation:

Neurons or nerve cells is the structural and functional unit of the nervous system. Neurons consists of the dendrites, axon, cell body and different cell organelles.

The neurons have mitochondria that meets the high ATP requirement and and consume more oxygen. The network of rough endoplasmic reticulum and ribosomes produce large number of proteins in neuron. The internal environment is never stable and gets changed as the nerve impulse transmission occur through the neuron. The membrane potential of the neuron gets changed and changes its internal environment.

Thus, the correct answer is option (B).

5 0
3 years ago
What physical quantity does symbol I stand for?
Ulleksa [173]

Answer:

Explanation:

ohm's law

V=IR

v = voltage

I= current

R = resistance

7 0
2 years ago
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