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2 years ago

A biodiversity hotspot is a region that has lost at least

2 answers:

6 0

To be classified as a biodiversity hotspot, a region must have lost at least 70 percent of its original natural vegetation, usually due to human activity. There are over 30 recognized biodiversity hotspots in the world.

aleksandrvk [35]2 years ago

5 0

Answer:

diversity throughout all living organisms

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Would an observational study or an experiment be more appropriate to investigate the effects on fertilizer on plant growth? Expl

Goryan [66]

Answer:

Experiment

Explanation:

For such an investigation an Experiment would be the better option. This is because in an experiment you would have both an experimental group and a control group. This would allow you to use fertilizer on one but not the other, therefore, providing seperate results that you can use to compare with one another. This ultimately helps you determine the actual effects that fertilizer has on the growth of plants, since the fertilizer would be the only variable in the experiment. An observational study would only allow you to observe the plants in a natural scenario, without interfering and seperating the plants into different groups with different environments.

6 0

3 years ago

The half-life of silicon-32 is 710 years. If 70 grams is present now, how much will be present in 200 years? (Round your answer

elena-s [515]

Answer:

$57.7$ grams

Explanation:

Given -

Half life of the silicon-32 $= 710$ years

Half life means the time period required by a radioactive element to reduce its mass by half.

Radioactive decay formula is

$A = A_o*2^{\frac{-t}{h} }$

Where

A represents the amount of radioactive element after time t years

$A_0$ represents the initial amount of radioactive element

$t =$ time of decay

$h =$ half-life of the substance

Substituting the given values in above equation, we get -

$A = 70 * 2^{\frac{200}{710} \\$

$A = 57.7$ grams

6 0

4 years ago

Can someone help me please this is due today

Nataly_w [17]

1. A
2.C
3. F
4.D
5.G
6.B
7. H
8.E

6 0

3 years ago

Read 2 more answers

Which option accurately describes the first two stages of photosynthesis?

DaniilM [7]

The answer is Stage 1: The thylakoid captures light energy. Stage 2: Chlorophyll converts it to chemical energy.

Photosynthesis is a process in which plant produce sugar and oxygen from water and carbon dioxide using the energy of sunlight. Cells of the green leaves contain chloroplasts. Thylakoids are the part of chloroplasts where the light-dependent reactions of the photosynthesis occur. They capture light energy, so chlorophyll inside the chloroplast can convert it to chemical energy.

4 0

3 years ago

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Which is the least number of seismograph stations needed to locate the epicenter of a earthquake

Hunter-Best [27]

At least three seismograph stations are needed to locate the epicenter of a earthquake.

Further Explanation:

An earthquake occurs when two region of the earth slip past each other. Fault plane is the area where the slip occurs. Hypocenter is the region below the earth’s surface where earthquake starts while the epicenter is the region above it.

The earth consists of four major layer:

1. Inner core

2. Outer core

3. Mantle

4. Crust

Seismographs is an instrument used to record the earthquake. The recording done by this instrument is called as the seismograms.

The seismograph comprises of:

1. A base: is fixed tightly in the ground

2. Heavy weight: hangs freely

When the earthquake occurs, the ground shakes and in turn the seismograph also shakes while the hanging weight does not shakes. During the earthquake, the difference in the location between the shaking piece and the motionless piece is recorded. Magnitude of the earthquake is recorded as one for each earthquake. The magnitude of earthquake is measured by the Richter scale but is more commonly measured through moment magnitude scale.

Learn more:

1. Learn more about earth brainly.com/question/5956881

2. Learn more about earth science brainly.com/question/1553517

3. Learn more about how sun energy reaches earth brainly.com/question/1140127

Answer Detail:

Grade: College biology

Subject: Biology

Chapter: Natural calamity

Keywords:

Seismograph stations, earthquake, fault plane, hypocenter, epicenter, inner core, outer core, mantle, crust, seismographs, instrument, seismograms, magnitude.

8 0

3 years ago

Read 2 more answers