BIOLOGY MIDDLE SCHOOL

Mr. Jones, the science teacher, tells his students that energy cannot be created; it must be captured from the environment. He is talking about the what. A: food chain
B: second law of thermodynamics
C: first law of thermodynamics
D: food web

Answers

Answer 1
Answer: A: food chain

In many functions of a living organism, it cannot make its own energy. It uses energy from its environment, retrieves and converts into a usable and edible matter. Organisms that can do this process is the autotrophs, they can facilitate photosynthesis which they gather energy from the sun, water and carbon dioxide in order to create energy by then, the transfer of this energy to other organism is played by the food chain –food web. 
Answer 2
Answer:

The question here is one after a lesson discussing the laws of thermodynamics. Within this lesson, you may find the fallowing passage: "According to the first law, an organism can absorb energy from its environment, or it can give up some of its energy to its surroundings. However, the total energy of the organism and its surroundings is always the same. The organism can't create the energy it needs to live. Instead, it must capture it from the environment. Once it captures energy, the organism can use the energy for its own biological work."

Answer: First Law of Thermodynamics

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Check your understanding. Which items did youinclude? Check all that apply.
The gene coding for the protein untwists and
unzips.
O RNA nucleotides form complimentary base
pairs with the DNA bases.
Hydrogen bonds and sugar-phosphate bonds
form and the mRNA strand is synthesized.
mRNA peels off the DNA and moves to the
cytoplasm.

Answers

RNA nucleotides form complimentary base pairs with DNA bases.  Hydrogen and sugar-phosphate bonds form and the mRNA is synthesized.

Explanation:

The process of mRNA formed by DNA is called transcription. The genes coding for the protein is present on DNA as a nitrogenous base or nucleotides.

Transcription takes place inside the nucleus with the assistance of major enzyme RNA polymerase. In transcription 5'to3' single strand of RNA is synthesized which is complementary to the 3'to5' strand of DNA. The sequence of DNA has promoter sites which will be recognized and DNA will unzip to form transcription bubble. Several transcription factors and enzyme will be required to synthesize mRNA.

This mRNA after some modification would become primary transcript and pass on to the cytoplasm where protein synthesis will take place.

Answer:

b and c

Explanation:

i did it

Temperature can weather rocks because _____.most rocks do not absorb heat evenly
water contracts when it freezes
heat can cause minerals to oxidize
rocks usually melt in the hot sun

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When wet rocks dry out, they can crack and break. This process, called slaking, is an example of what?
chemical weathering
physical weathering
water erosion
wind erosion

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In which of the following locations would chemical weathering happen most quickly?
Amazon rainforest
Sahara desert
North Pole
Great Plains
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Which of the following is an example of chemical weathering?
A river carrying dirt into a lake.
Wind carrying sand from a beach.
Chemicals in water dissolving minerals in rock.
Friction between two rock surfaces grinding away minerals.

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Choose all the answers that apply.

Erosion:
can damage aquatic ecosystems
removes fertile topsoil
can decrease revenue from agriculture
is caused mainly by wind and water
is the breakdown of rock and other material

----



Choose all the answers that apply.

Erosion can be reduced by:
contour plowing
putting up fences
planting trees
removing topsoil

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Which of the following statements is true?
Since the Dust Bowl, erosion has not been a problem in the United States.
The most fertile part of soil is found a few feet below the surface.
Runoff happens when the ground cannot absorb anymore water.
Oxidation happens when carbonic acid gains electrons from oxygen.

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PLEASE HELP 911

Answers

Answer:

given below

Explanation:

1) correct answer is option c)

when the temperature changes it leads to oxidize the mineral which leads to create crack.

2) correct answer is option b)

physical weathering is the process of to crack and break in wet rock.

3) correct answer is option a)

In amazon rainforest the chances of chemical weathering is very high.

4) correct answer is option d)

erosion is the process in which the rock and mineral  break down into smaller pieces.

5) correct answer is option c)

planting tree can reduce erosion as tree binds the top layer of soil.

6) true answer is option c)

runoff occurs when no water is absorbed by the soil.
rocks can oxidize in heat and the minerals can cause the rock to crack and break off .

slaking is physical weathering because the rock is still the same, but its wet.

chemical weathering would happen the most quickly in the amazon rainforest.

chemicals in water dissolving minerals in rock is chemical weathering.

erosion removes fertile topsoil, is caused mainly by wind and water, and can decrease revenue from agriculture.

erosion can be reduced by planting trees and contour plowing.

runoff happens when the ground cannot absorb anymore water is a true statement.
 

 

Please help with answer

Answers

C. 50% would be the answer

Answer:

C. 50%

Explanation:

In a Punnett Square, 2 out of 4 squares show the long hair allele (Ll).

What are 4 basic needs all living things must satisfy

Answers

shelter food water and homeostasis 

Here you go: Homeostasis, Reproduction, Metabolism, Growth, Response to enviroment hope this helps!!

During what processes of the water cycle does a liquid turn into gas

Answers

evaportation is the process in which water changes from liquid to gas or vapor

HELP ME PLEASE I BEG YOU I RELLY NEED IT URGENT !!!! 15 points!

Answers

The easiest example here is a computer/laptop... e.g. when the CD-ROM is spinning when you are perhaps playing a movie, the kinetic energy causes friction, which results in heat.  All computers need a fan to prevent them over-heating for this very reason.  Therefore heat is lost and energy is wasted.

Another example is a lightbulb.  When a light is switched on and left for a long time, the current flowing through the filament (the thin bit of wire in the bulb) causes heating (due to electron-ion collisions but you may not need to know that) so energy is wasted as thermal energy instead of light energy.

These are just a few examples but other ones you could use are tv screens, kettles, toasters, etc :)
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