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Semenov [28]
3 years ago
15

HELP PLEASE I WILL GIVE YOU THE BRAINLIEST

Biology
1 answer:
Bad White [126]3 years ago
8 0

Answer:

a difficult to identify

Explanation:

you can identify this type of fossil by the following-

distinctive, widespread, abundant, and limited in geologic time.

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What is the manipulated variable in this experiment?
jasenka [17]

The correct answer is C. The temperature of the water

Explanation:

In an experiment such as the one described about the speed of snails in water, the manipulated variable is the factor or element that is manipulated on purpose. This means the researcher or researchers slightly change this element to compare how this affects another variable. In this context, the manipulated variable is the temperature of the water because researchers used three different temperatures (cool, room-temperature, and warm), and therefore they manipulated or changed this factor. Moreover, it is expected temperature affects the distance nails move, which is the main variable.

7 0
3 years ago
People with ________ experience complete cessation of respiratory activity for brief periods of time yet do not have frequent aw
denis-greek [22]

People with central sleep apnea experience a complete cessation of respiratory activity for brief periods of time yet do not have frequent awakenings and do not tend to feel tired during the day.

<h3>What is sleep apnea?</h3>

Breathing regularly stops and starts during sleep, which is known as sleep apnea. People may have sleep apnea if they snore loudly and still feel exhausted after a full night's sleep.

These are the primary forms of sleep apnea:

The more prevalent type of obstructive sleep apnea happens when throat muscles relax.

Central sleep apnea, which develops when your brain fails to properly activate the breathing muscles,

When a person has both central and obstructive sleep apnea, it is known as complex sleep apnea syndrome, also called treatment-emergent sleep apnea.

To know more about sleep apnea, visit:

brainly.com/question/17319187

#SPJ4

4 0
1 year ago
A rotating column of air is called an
Darina [25.2K]
A tornado, or twister.

Hope this helps ya :P
6 0
3 years ago
Read 2 more answers
You are a molecule of phosphorus. Choose a starting point in the process you would go through to move through the entire cycle.
noname [10]

Answer:

First I'd be found in rocks. Erosion would wash me into the soil. Then I'd be absorbed by plants, fungi or microorganisms so they can grow. Animals would get me by eating the plants or drinking the water that eroded the rock. The plants and animals die and I'm absorbed back into the soil.

Explanation:

Phosphorus Cycle Steps

The phosphorus cycle is a slow process, which involves five key steps.

Weathering

Since the main source of phosphorus is found in rocks, the first step of the phosphorus cycle involves the extraction of phosphorus from the rocks by weathering. Weather events, such as rain and other sources of erosion, result in phosphorus being washed into the soil.

Absorption by Plants and Animals

Once in the soil, plants, fungi, and microorganisms are able to absorb phosphorus and grow. In addition, phosphorus can also be washed into the local water systems. Plants can also directly absorb phosphorus from the water and grow. In addition to plants, animals also obtain phosphorus from drinking water and eating plants.

Return to the Environment via Decomposition

When plants and animals die, decomposition results in the return of phosphorus back to the environment via the water or soil.  

Plants and animals in these environments can then use this phosphorus, and step 2 of the cycle is repeated.

Human Impact on the Phosphorus Cycle

Humans have had a significant impact on the phosphorus cycle due to a variety of human activities, such as the use of fertilizer, the distribution of food products, and artificial eutrophication. Fertilizers containing phosphorus add to the phosphorus levels in the soil and are particularly detrimental when such products are washed into local aquatic ecosystems. When phosphorus is added to waters at a rate typically achieved by natural processes, it is referred to as natural eutrophication. A natural supply of phosphorus over time provides nutrients to the water and serves to increase the productivity of that particular ecosystem. However, when foods are shipped from farms to cities, the substantial levels of Phosphorus that is drained into the water systems is called artificial or anthropogenic eutrophication. When levels of phosphorus are too high, the overabundance of plant nutrients serves to drive the excessive growth of algae. However, these algae die or form algae blooms, which are toxic to the plants and animals in the ecosystem. Thus, human activities serve to harm aquatic ecosystems, whenever excess amounts of phosphorus are leached into the water.

8 0
3 years ago
List the four classes of the phylum protozoa and their locomotory organelles​
7nadin3 [17]

Answer:

Approximately, 50,000 types of Phylum Protozoa have been identified. Its four divisions are Amoeboid Protozoa or Sarcodines, Flagellated protozoans or Zooflagellates, Ciliated protozoa or Ciliates and the Sporozoans.

<h3><u>PLEASE</u><u> MARK</u><u> ME</u><u> BRAINLIEST</u></h3>
7 0
3 years ago
Read 2 more answers
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