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3 years ago

10

Regions of the sea floor with positive magnetic anomalies were found during times when earths magnetic field ______. (PLZ Help m

e FILL IN THE BLANK)

1 answer:

LenKa [72]3 years ago

5 0

Answer:

Regions of the sea floor with positive magnetic anomalies were found during times when earths magnetic field had reversed polarity.

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Which characteristic distinguishes fungal cells from plant cells

sertanlavr [38]

Answer: Feeding behaviors, trophic levels, cell wall composition, and their organelles distinguish fungi from plants.

Explanation:

While plants and fungi are both eukaryotes, they differ in terms of feeding behaviors, trophic levels, cell wall composition, and their organelles.

Cell walls: both are non-chain polysaccharides (sugars) that function as structural support; yet fungal cell walls are composed of chitin while plant cell walls are made up of cellulose

Feeding: fungi secrete compounds that digest their food sources before they can take in nutrients and they store food as <em>glycogen; </em>while plants do not require a means of pre-digesting food and store their food as <em>starch.</em>

Organelles: plant cells contain <em>chloroplasts</em>, small green structures with chlorophyll that causes their characteristic coloration. Unlike plants, fungi do not photosynthesize to make their own food or contain chloroplasts.

Trophic level: are strictly <em>heterotrophs or decomposers, </em>depending on other organisms for survival. Their chloroplasts enable them to carry out photosynthesis, thus they are <em>autotrophs or producers. </em>

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3 years ago

Who described atoms as having a positive nucleus with electrons that have different energies at different energies at different

galina1969 [7]

<span>Bohr hope it helps
:D</span>

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3 years ago

Which change is an environmental effect of burning fossil fuels?

Jobisdone [24]

Answer:

Fossil fuels produce large quantities of carbon dioxide when burned. Carbon emissions trap heat in the atmosphere and lead to climate change

Explanation:

8 0

3 years ago

At 20°C the enzyme that catalyzes the breakdown of polysaccharides functions at 1 reaction every 20 microseconds. If this enzyme

lora16 [44]

Answer:

Seven segments

Explanation:

As given in the question -

After every twenty microseconds one reaction occurs i.e breakdown of polysaccharides.

This means that after every twenty microseconds the polysaccharides is broken down

The total time for this hydrolysis reaction is $120$ micro seconds

Thus , there will be six phases of division each after every twenty microseconds

After 1st twenty microseconds , total segments is equal to two

After 2nd twenty microseconds , total segments is equal to three

After 3rd twenty microseconds , total segments is equal to four

After 4th twenty microseconds , total segments is equal to five

After 5th twenty microseconds , total segments is equal to six

After 6th twenty microseconds , total segments is equal to seven

4 0

3 years ago

How does an enzyme change the activation energy for a reaction in a cell?

k0ka [10]

Answer:

The correct answer is option c. "Enzyme lowers the activation energy".

Explanation:

The activation energy is defined as the amount of energy needed for a reaction to take place. Enzymes catalyze reactions by lowering the activation energy, which speeds up the reaction and increases its rate. Enzymes put a substrate in its active site, which facilitates the reaction and makes more likely that it collides with its subsequent substrate.

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2 years ago