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Alenkinab [10]
3 years ago
10

Once you have stopped for a school bus, do not pass until the driver signals you to proceed, the red lights stop flashing,

Biology
1 answer:
DaniilM [7]3 years ago
7 0
Once you have stopped for a school bus, do not pass until the driver signals you to proceed, the red lights stop flashing, or the bus starts moving ahead. Whenever a vehicle ahead of you stops to let  a pedestrian pass in front of you, you should stay in line and until the vehicle ahead proceeds. 
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The target cells for the hormone acth are located in the _______.
Sergio [31]
Hey there Ashley Gonzales1137,

Answer:

Adrenal Cortex

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7 0
3 years ago
Earthworms have a(n) , birds have a(n) , and spiders have a(n) . Endo exo or hydroskeleton these choices are used for all three
dezoksy [38]
<span>The types of skeleton depend on where they are located. Earthworms have hydroskeleton because their rigid bodies are based on water pressure so it's hydro then. Endo is found in animals like birds and also humans who have it inside. Exo is found in spiders because they are bugs and bugs have their skeletons like a shell that covers them.</span>
8 0
3 years ago
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A circle with radius of 9 cm sits inside a circle with radius of 11 cm.
malfutka [58]

Answer:

125.6

Explanation:

Area of a circle = πr^2

Area of circle 1 = 3.14 × 11 × 11

=379.94cm^2

Area of circle 2= 3.14 × 9 ×9

=254.64cm^2

Area of a shaded region

=379.94cm^2 - 254.64cm^2

=125.60cm^2

3 0
3 years ago
What do many scientists believe about the purpose for asteroids.
katovenus [111]

Answer:

Various scientists describe asteroids in different ways:

  • Some scientists consider it to be rocks which orbit around the sun.
  • Other consider it to be small planets.

The majority of the scientists agree that asteroids might have come into existence at the time of solar formation. The parts which broke down during the formation of the solar system resulted in the formation of asteroids.

<u><em>Scientists believe that asteroids might not have a major function in the universe but studying them would be of great benefit. This is because as they are parts broken from the solar system, exploring them will let us know about some unknown features of the other solar system bodies. </em></u>

5 0
3 years ago
Why is breaking and rearranging bonds in the process of photosynthesis and cellular respiration important? WILL GIVE BRAINLIEST
____ [38]

Answer:

Photosynthesis

All organisms in the plant kingdom are autotrophs/producers and therefore carry out photosynthesis.  Photosynthesis occurs in the chloroplast (figure 1) of plant cells which are concentrated predominantly in the leaves.  The chloroplasts contain the green pigment chlorophyll, giving leaves their green color, and is responsible for capturing light energy to power photosynthesis.

Picture

Figure 1

All living things need a few basic things to survive, we learned these things as the four basic needs of living things.  Plants are no exception to this and require space, gases, food, and water like all other living organisms.

The two basic needs, water and gas are especially important for a plant to carry out photosynthesis. The water and gas makeup two of the three reactants of photosynthesis. The needed water (H2O) is absorbed from underground into the roots of the plant and is then transported to each cell by the vascular tissue xylem.

Picture

Figure 2 https://upload.wikimedia.org/wikipedia/commons/d/db/ Photosynthesis.gif

Plants cannot carry out photosynthesis without carbon dioxide (CO2), the gas animals exhale. Plants take in CO2 and release O2 (the opposite of animals) by the process of transpiration (respiration in animals).  

Although plants do not have lungs or lung-like structures, they do have small pores on the underside of their leaves that regulate transpiration.  These pores are called stoma or stomata and allow CO2 and O2 to enter and exit the plant leaves.  Each stoma is surrounded by two guard cells that open and close the stoma.  Stomata remain open when the plant is in need of CO2, during photosynthesis, and closed during times of photosynthetic inactivity.  You will be conducting a lab during which you will test when stomata tend to be open vs when they tend to be closed.

In addition to CO2 and H2O, plants must also have sunlight or light energy.  As mentioned above, the light energy absorbed by the chlorophyll powers the process of photosynthesis. Sunlight is responsible for breaking the molecular bonds of the CO2 and H2O and then rearranging the atoms into the products of photosynthesis, glucose (C6H12O6) and oxygen (O2). Through photosynthesis, light energy is converted into stored energy, the glucose (food).

To summarize: Energy from the sun is converted into stored chemical energy or food called glucose in the plant cell by the process of photosynthesis. The green pigment- chlorophyll- is located in the chloroplast and captures the sunlight. The energy from the sun is then used to change the carbon dioxide and water into the sugar glucose and oxygen. Glucose is a sugar that is stored energy for later use.

Explanation:

5 0
3 years ago
Read 2 more answers
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