helppppp
A scientist is designing an investigation to study the impact of UV radiation present in high-altitude habitats on the population of mountain yellow-legged frog. What type population is most likely to be a control group for the study? (4 points)

a
Mountain frogs in low-altitude habitats only

b
Mountain frogs in their natural high-altitude habitat

c
Mountain frogs in a lab setting exposed to UV rays from a sun lamp

d
Mountain frogs in a lab setting with no UV ray exposure

Answers

Answer 1

Answer:

c

Explanation:

if the scientist was to look close there skin would be tightened up on the frog it is hard to see but if you look close you could see it

Answer 2

Answer:

C or D I think

Explanation:

D, you could compare frogs with no UV ray exposure to the ones with UV ray exposure

C, you can do the same but reverse

Edit: Meaning of control group is "A control group in a scientific experiment is a group separated from the rest of the experiment, where the independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternative explanations of the experimental results."

So its more likely to be D


Related Questions

Approximately 50 million acres of tropical rainforest are cleared each year. Which effect most likely would result from the clearing of these forests?

a. A decrease in soil erosion
b. An improvement in water quality
c. A decrease in biodiversity
d. An improvement in air quality ​

Answers

Answer:

A.

Explanation:

The effect most likely would result from the clearing of these forest is A decrease in soil erosion.

What is reforestation and why is it important?

Reforestation is of great importance in combating climate change. In the increase of water resources, in the reduction of damages in agriculture related to floods, in the increase of the sustainable stock of legal wood, in the sequestration of CO2 and reduction of the greenhouse effect.

Reforestation consists of repopulating deforested areas to recover forests that were destroyed in the recent past.

See more about reflorestation at brainly.com/question/16214155

#SPJ2

QUICK! 30 POINTS

D is crossed out because it is wrong.

Answers

Answer:

C. There is a loss in energy

Explanation:

________ are individual organisms with a gastrovascular cavity and circle of tentacles that make up coral.
A) Polyps
B) Algae
C) Nematocytes
D) Planulae
E) Atolls​

Answers

I think it’s A. Hope this helps :)

What are weather balloons?

Locations with instruments that measure weather conditions in specific land areas
Numerical equations based on weather-related factors that forecast weather
Objects that carry instruments into the stratosphere to measure atmospheric conditions
Structures that orbit Earth in the exosphere to capture images and collect data

Answers

Answer:

What are weather balloons?

Objects that carry instruments into the stratosphere to measure atmospheric condition.

Answer:

c i think i hope u get a good test score

Explanation:

A researcher is studying a cornfield that has been recently abandoned by a farmer. By the end of one
year, wild grasses begin to grow in the field.
Identify whether this is an example of primary succession or secondary succession.

Answers

Answer:

ummm

Explanation:

Early civilizations made pottery as functional and decoritave objects.they used geometric and free flowing designs.what design was especially important in ancient pottery? A) circle B) square C) spiral D triangle if this gets annoying sorry dudes and dudettes

Answers

Answer:

most potteries were Circular, Such as in Egypt they had slavery, but it wasn't like European slavery. They would grow their farms to provide for their families. one main way was to carry water back for their crops in circular plates and vases.

You could say Egyptian slavery wasn't slavery. it was mainly just everyone fending on their source of crops. And everyone could sell their crops for more produce.

Explanation:

Answer choice: Circle

Two students are given cubic boxes, measuring 10 cm on a side. Robert puts a single glass marble with a
diameter of 10 cm in the box. Susan puts 1,000 1-cm glass marbles in her box.

1. Whose box has more empty space? Explain.

Answers

Answer:

Both boxes have the same amount of empty space

Explanation:

Given

Cube Box

[tex]Length = 10cm[/tex]

Robert:

1 glass marble

[tex]Diameter = 10cm[/tex]

Susan:

1000 glass marble

[tex]Diameter = 1cm[/tex]

Required

Whose box has more empty space?

First, we need to calculate the volume of the cubic box.

[tex]Volume = Length^3[/tex]

Substitute 10cm for Length

[tex]Volume = 10^3[/tex]

[tex]Volume = 1000cm^3[/tex]

Next, calculate the volume of Robert's glass

Volume is calculated as:

[tex]Volume = \frac{4}{3}\pi r^3[/tex] ---- Volume of a sphere

Where

r = radius

[tex]r = \frac{1}{2} * Diameter[/tex]

[tex]Diameter = 10cm[/tex] --- Given

Substitute 10 for diameter

[tex]r = \frac{1}{2} * 10cm[/tex]

[tex]r = 5cm[/tex]

So:

[tex]Volume = \frac{4}{3}\pi r^3[/tex]

[tex]Volume = \frac{4}{3} * \frac{22}{7} * 5^3[/tex]

[tex]Volume = \frac{4}{3} * \frac{22}{7} * 125[/tex]

[tex]Volume = 523.8cm^3[/tex]

Next, we determine the volume of Susan's 1000 glasses

Volume is calculated as:

[tex]Volume = \frac{4}{3}\pi r^3[/tex] ---- Volume of a sphere

Where

r = radius

[tex]r = \frac{1}{2} * Diameter[/tex]

[tex]Diameter = 1cm[/tex] --- Given

Substitute 1cm for diameter

[tex]r = \frac{1}{2} * 1cm[/tex]

[tex]r = 0.5cm[/tex]

Substitute 0.5cm for radius in [tex]Volume = \frac{4}{3}\pi r^3[/tex]

[tex]Volume = \frac{4}{3} * \frac{22}{7} * 0.5^3[/tex]

[tex]Volume = \frac{4}{3} * \frac{22}{7} * 0.125[/tex]

[tex]Volume = 0.5238[/tex]

But there are 1000 glasses.

So, the volume of 1000 glasses is:

[tex]Volume = 0.5238 * 1000[/tex]

[tex]Volume = 523.8cm^3[/tex]

--------------------------------------------------------------------------------------------------------------

For Robert:

[tex]Volume = 523.8cm^3[/tex]

For Susan:

[tex]Volume = 523.8cm^3[/tex]

Since, they have the same volume.

Both boxes have the same amount of empty space

From the dimensions of glass marble for robert and susan, we can say that; none of the given boxes have more empty space.

We are told that the cubic boxes have a measure of 10 cm for its' sides.

Formula for volume of a cube is;

V = lwh

where;

l is length

w is width

h is height

Thus; V = 10 × 10 × 10

V = 1000 cm³

For Robert;

We are told that he puts a glass marble with a diameter of 10 cm in the box. The glass is usually spherical in shape and the volume of a sphere is;

V = ⁴/₃πr³

Thus;

V_rob = ⁴/₃π × (10/2)³

V_rob = 523.6 cm³

Volume left for rob = 1000 - 523.6

Volume of empty space left for rob = 476.4 cm³

For Susan;

V = ⁴/₃πr³

Thus;

V_sus = ⁴/₃π × (1/2)³ × 1000

V_sus = 523.6 cm³

Volume left for susan = 1000 - 523.6

Volume of empty space left for susan = 476.4 cm³

Read more at; https://brainly.com/question/3948796

Why are water striders able to "walk on water"?​

Answers

Answer:

Water striders can walk on top of water due to a combination of several factors. Water striders use the high surface tension of water and large hydrophobic legs to help them stay above water. Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight.

Hope this helps :)

It is best to say that the protection to properties offered by sea walls along coasts _______.
a.
decreases the present and future risk to human properties
b.
increases both the present and future risk to human properties
c.
decreases the present but increases the future risk
d.
increases the present but decreases the future risk


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer: a.  decreases the present and future risk to human properties

Explanation:

Properties along the coasts can be in danger when high tides come in. This can however be mitigated by walls protecting those properties as it would take a significantly high tide (flood proportion) to scale those walls and come in and damage the property.

These walls therefore not only decrease the present risk to human properties but if maintained, decrease the future risks as well.

Answer:

A.

Explanation:

decreases the present and future risk to human properties

what causes a seismic waves

Answers

Answer:

Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs. Earthquakes radiate seismic energy as both body and surface waves.

Explanation:

Answer:

caused by the sudden breaking of rock within the earth of an explosion.

Explanation:

dont judge me if im wrong

find the kinetic energy of a ball of mass 200 grams moving at a speed of 20m/s​

Answers

We have a mass of 200g (0.2kg) moving at 20m/s

Kinetic Energy KE = ½ mv^2 where m is mass and v is velocity

Actually, v is a vector quantity, so KE = ½ mv•v

The dot product of 2 vectors a and b is abCosθ where θ is the angle between the vectors.

Obviously v•v = v^2 Cos0 = v^2

In this case, we have KE = ½ (0.2)(20^2) = 40kg-m^2/s^2 = 40J

So we have kinetic energy in the amount of 40 Joules.

Answer is 40J...............

What is an advantage of asexual
reproduction?
A. Creates genetic diversity.
B. Occurs quickly.
C. Produces a small number of offspring, D. Produces identical offspring.

Answer that is correct and with explanation gets brainliest!​

Answers

Answer:

B

Explanation:

he population can increase rapidly when the conditions are favourable. only one parent is needed. it is more time and energy efficient as you don't need a mate. it is faster than sexual reproduction.

Pleas give me an answer if you actually really know the answer because everybody is giving different answers, pls

Answers

Answer:

plants

Explanation:

plants are green

Answer:

Some kind of organisms that chloroplasts are found in are green plants and algae, also photosynthetic tissues that are not green, such as red leaves, etc.

Explanation:

Hope it helps!

Reasoning: Write a three sentence statement that connects your evidence to your claim
about living organisms.

Answers

Answer:

Living organisms such as birds, animals, plants and microorganisms form the biotic component while land, air and water form the abiotic components. Biotic and abiotic components interact with each other resulting in transfer and replenishment of energy and nutrients.

Explanation:

Which type of cancer is the fastest growing? Explain your answer, using your relevant data.
What changes happen in cancerous cells?

Answers

Answer:

more pain

Explanation:

some cells will die and this disease cannot be

treated and you would feel more pain

and so dangrous

What is DNA replication? Highlight your answer.

A. Conservative
B. Non-conservative
C. Semi-conservative
D. None of the above

Answers

Answer:

C

Explanation:

HELP PLEASE!! NEED ANSWER REALLY QUICK!

Answers

Answer:

b

Explanation:

Write 3 things you know about the Carbon Cycle.
Pls help ASAP!

Answers

Answer:

Carbon moves from living things to the atmosphere.

Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.

Carbon moves from fossil fuels to the atmosphere when fuels are burned. ...

Explanation:

how can the people who take antibiotics increase resistant bacteria populations? Please answer using the scientific method!​

Answers

Answer:

How do bacteria become resistant to antibiotics? Antibiotic resistance occurs when bacteria change in some way that reduces or eliminates the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections. The bacteria survive and continue to multiply causing more harm.

Outline THREE adaptations of terrestrial plants for their survival in their habitat.

Answers

Answer:

Stomata for gas exchange, water resistant waxy cuticles on leaves and specialized cells for support.

Explanation:

Plants have undergone several modifications for life on land. These include the development of several mechanisms:

a waxy, thick water-repellent cuticle- the thick cuticle provides a barrier to water loss from plant tissues in the leaf. stomata- these moderate the evaporation of water, an important commodity to land dwelling terrestrial organisms. They also regulate gas change cells to provide strength and rigidity- plant cells are specialized cells that contain lignin and cellulose, these are rigid provide good support against gravitational forces, Without them the stem would break and the cells would readily lose water

how can a long-term environmental change can lead to the development of a new species

Answers

When a long-term environmental change occurs, certain individuals in a population will be better adapted for the new environment than others. ... Over many generations, these favorable adaptations build up in a population. This may lead to speciation, which is the development of a new species.

Answer:

A long term change can affect how species of right now live and act.

Explanation:

Eventually, that new change would cause an evolution to occur for that species so that they can adapt and be fully prepared for the change that occur so that they can survive.

#teamtrees #WAP (Water And Plant)

Plants have an added layer that animal cells do not. What is that added layer called?

Answers

Answer:

a cell wall

Explanation:

What significance does the temperate zone have on commercial fishing?
a. the zone's clear water makes it easier to catch fish
b. mostly consists of large fish that are more commercially viable
c. greater abundance of commercial species
d. very few mammalian species that compete for the fish

Answers

Answer:

I believe C. greater abundance of commercial species is your answer. hope this helps and have a nice day!

Answer:

It is C!

Explanation:

PLATO

Which of the following is true about a light-year?

A)It is a measure of time.

B) It takes one light-year for light from the Sun to reach Earth.

C) it takes one light-year for Earth to orbit the Sun.

D) It is a measure of distance.


plz answer ^w^
thx​

Answers

Answer:

D) It is a measure of distance.

Explanation:

I belive is the answer

Answer:

E - which is the year is light

Considering the connections between Yellowstone’s wolves, aspen and willow trees, and elk; which one is the keystone species.

Answers

Answer:

The keystone species is the wolf.

Explanation:

Every species of organism is important to the ecosystem, so if just one species gets extinct for whatever reason there will be consequences for the other species. How big the consequences will be, depends on the species and on how big of an effect it has on the ecosystem. Some species have relatively small importance, while some have huge importance, and the ones that have huge importance are called keystone species.

The keystone species have such big importance to an ecosystem that with their presence everything is under control, but if they go extinct then the ecosystem suffers badly and changes dramatically. In this case, a keystone species is the wolf. The wolves control the elk population, which in turn means that there is no shortage of food for the elk and they don't damage the young trees. By not damaging the young trees, they grow, so there is a much larger area covered by forest. More forest means less erosion, the water of the streams is better controlled, and there is less meandering. If the wolves are out of the picture, as they were for some time, the picture is totally opposite.

Jorge conducted an experiment and included the graph shown below as part of his lab report.
Jorge's experiment involved which of the following? DS
(5 Points)
A change in the chemical properties of a substance
The formation of a new substance.
O A physical change
A chemical change.


Plsss help

Answers

Answer: A

Explanation:

Pls help me with this question
B. Explain the steps used to separate chalk powder, rice grains and stones

Answers

Answer:

chalk powder can be seaprated by dissolving with water

rice grains remain

stones by hand

Answer:

chalk with the machine and rest all with hands

Explanation:

how can drip irrigation be useful in farming​

Answers

Answer: It helps control the water better and more efficiently. It also helps to save water

Explanation:

How are the causes of ocean acidification and climate change related to one another

Answers

Answer:

The rising concentration of carbon dioxide in the atmosphere is driving up ocean surface temperatures and causing ocean acidification. The rate at which water absorbs CO2 decreases as water temperature increases.

Explanation:

Found it on google lol

how many chromosomes do whales have

Answers

Answer:

i have been researching and i found they have 42 chromosomes. Blue whales have 44 and sperm whales have 46 i was getting different numbers for different whales

Explanation:

Hope i helped!

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Vivian scored 8 out of 10 on a quiz. Ramona scored 3 out of 4. Did Vivian and Ramona get equivalent scores? Explain. please help me with this In a sandwich shop, 22% of the sandwiches they sell are ham. What is 22% writtenas a decimal? 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Type =AVERAGE( in the formula bar. Select all the cells containing the values for which you want to find the average, and then press Enter. The average of the values in the cells will be calculated and displayed in the cell in which you entered the formula. Question 1 What is the sample mean of the responses in survey 1? How is the process of photosynthesis essential to sustaining life on Earth? When would the carrying capacity of an area be most likely to change?when resources remain the sameafter a fire or floodif emigration takes placefor all species at the same time Questions 29: Give an appropriate synonym for the italicized word in each of the followingsentences.2. We attended a wonderful performance of Shakespeare's King Richard III.3. The picnic took place on a wonderful afternoon in May in an orchard by a lake.4. The pasta dishes at the new restaurant in the park are wonderful5. Due to the heavy snow, the company was closed and we spent a wonderful day at home6. The new employee has a wonderful personality7. Even though the play was on Broadway, the performance we saw was terrible.8. It's a terrible article, mostly because the author doesn't know his subject well.9. The food at the new restaurant is terrible. 3. (-3, 5); y = *-4Write an equation passing through the point and the perpendicular to the given line What is: 7x + 1.8 + 2.2 = 30Step-by-step explanation pls! :) Two students described a part of Earth's middle layer. Bob: The deepest part Joe: The semi-fluid part Which part of the middle layer did Bob and Joe describe? (1 point) a They both described the mesosphere. b They both described the asthenosphere. c Bob described the mesosphere and Joe described the asthenosphere. d Bob described the asthenosphere and Joe described the mesosphere. list three people who you think are being role models or admirable Which statement is most likely to show a constant rate of change???A. The outside temp compared with the time of day.B. 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