Currently where are we in the cycle of biodiversity?A. beginning of mass extinction
B. middle of mass extinction
C. near the end of mass extinction

Answers

Answer 1

Answer: We are currently undergoing a process of mass extinction - it is called the Holocene extinction, and it has started around 10 000 BCE (so we reject the answer A).

However, the end of mass extinction is not something we predict, instead, we predict that this mass extinction will continue, so the correct answer is
B. middle of mass extinction

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In science, which one of the following would be considered an observation? Waves are usually caused by a distant storm. Waves lose little energy as they travel across the ocean. Waves are seen to approach the beach at an angle. Waves are the result of a disturbance (release of energy) somewhere in the ocean. Waves transfer wind energy from the surface to deeper water.
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Sea food is a rich source of?? a) fluorine b) potassium c) calcium d)iodine

Answers

Answer: d) iodine

Explanation: because sea water is salty so the all sea animals live in salty water because of that it contains rich of iodine

IT SHOULD BE HEPLFUL.

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What happens during interphase?

Answers

the cell prepares for mitosis

the resting phase between successive mitosis divisions of a cell,basically the mother cell is resting there.

DNA samples can be separated according to size using the technique of(1) chromatography (3) replication
(2) electrophoresis (4) dissection

Answers

Answer:

Option 2

Explanation:

Electrophoresis or in general known as "Gel electrophoresis" is a process by which separates and arranges DNA as per their size. In this process, DNA samples are placed at one end and at the other end electric current is applied. As we know that DNA fragments carry negative charge on them, hence they move towards the positively charged electrode. Also, all the DNA fragments have the same charge on it, therefore the larger the DNA fragment the more negatively charged the DNA is and hence the more rapidly it moves towards the positive electrode.

At the end of the electrophoresis, same-sized DNA fragments arrange themselves in a row.

Hence, option 2 is correct

(2) Electrophoresis.

Chromatography is the separation of colors/inks.
Replication replicates DNA.
Dissection can't really be done on DNA.
Electrophoresis is a process using gel that separates DNA by size.

What usually accompanies a cold spell in Minnesota?O A. The polar jet stream moves south.
O B. The polar jet stream moves north.
O C. The horse latitudes moves north.
O D. The doldrums moves south.

Answers

The polar jet stream moves south is accompanies a cold spell in Minnesota. Therefore, option (A) is correct.

What do you mean by polar jet stream?

Polar jet stream is a belt of strong upper-level breezes that sits on the polar front. The winds generally move in a westerly direction in midlatitudes and are strongest at the tropopause, the upper boundary of the troposphere.

The convergence of cold air masses coming down from the Arctic and warm air coming up from the tropics creates the jet. Profound box and soak edges arise as the denser virus air sinks and redirects warm air locales north, giving the fly stream its wavy appearance.

The northern polar jet stream is the most important jet stream for aviation and weather forecasting on Earth because it is much stronger and lower in altitude than the subtropical jet streams.

Learn more about polar jet stream:

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A. The correct answer is “Polar jet streams moving south.”

Which of the following best describes what can affect enzyme activity?

Answers

Temperature, pH, enzyme concentration, substrate concentration, and the presence of any inhibitors or activators can affect enzyme activity.

Plants are able to release water back into the atmosphere by a process called _____. evaporation precipitation transpiration sublimation

Answers

Transpiration is the process in which plants release water back into the atmosphere in the form of water vapor. In simplest terms, transpiration is the evaporation of water from plant leaves. This process occurs from the roots of the plants that carry moisture to the undersides of the leaves and is then released through the pores of the leaves back into the atmosphere. About 10% of the moisture in the atmosphere is released by plants through this process; while the other 90% come from bodies of water.

Answer:

Transpiration

Explanation:

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