BIOLOGY MIDDLE SCHOOL

This phrase, found in Darwin's origin of Species, suggest that species adapt natural

Answers

Answer 1
Answer: Survival of the fittest.

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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 ---- 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 ----- In which of the following locations would chemical weathering happen most quickly? Amazon rainforest Sahara desert North Pole Great Plains ----- 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. ---- 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 --- 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. ---- PLEASE HELP 911
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Describe Earth's magnetic field. Include an explanation of how scientists believe it is generated. Also include two ways in which it helps people on earth.

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The magnetic field extends from the Earth's interior out into space, where it meets the solar wind, a stream of charged particles emanating from the Sun.

Scientist believe that due to the molten liquid iron of the Earth's core, and to the fact that iron is magnetic and can create an electric current, the constant turning is what creates the magnetic field.

The sun releases high charged particles on the Earth, without the magnetic field we would experience bursts of radiation on the ground.

What are levels of organization in multicellular organisms?

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The cellular organization relates with one another since the colossal cell, the organ system is fundamentally composed of cells. Cells are the building blocks of these structures and which creates such organ and organ system. They associate as one cell intercommunicates with another cell until all received the message and translates it and sends it with another organ and to cell -vice-versa. And also, they become interdependent with the other cell -other tissue -other organs -other organ system. 
Cells when grouped form tissues, when group of tissues are formed together they make organs, some organisms skip from organs to organs systems to form an existing organism as a whole. Describing how is the cells group is the process of multiplication of cell or the so-called cell division, mitosis.This mechanism of each cell produces another cell that binds together and produces again, repeatedly, to be a larger system called now the tissue as explained earlier. How? Through cell division called, mitosis. Excerptmeiosis –cell division specifically in the sex cells. 

In Figure 7-2. are the animal burrows in B an example of chemical or mechanical weathering?

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The animal burrows in Diagram B are an example of mechanicalweathering, and weathering is of many types, such as physical, chemical, and mechanicalweathering.

What are the different types of weathering?

Weathering is a process in which the chemical composition of the matter may or may not change, the size of the matter may or may not change, etc. There are different types of weathering, such as physical weathering, chemical weathering, and mechanical weathering.

Mechanical weathering is a type of weathering in which changes can be seen, such as roots growing in rocks, whereas chemical weathering changes the chemical composition. The chemical weathering changes the composition so that the original and the new composition change in seen in the case of the rocks, the soil, etc., and in the physical weathering the size changes, such as from the large rock to the smaller form.

Hence, the animal burrows in Diagram B are an example of mechanicalweathering.

Learn more about the weathering here.

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Answer:

Mechanical

Explanation:

In a fox population the frequency of red fur changes from 20% to 50% in the population within 2 generations. What can be said about that population of foxes?

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Answer:

The population is evolving

Can someone please help me this question?The choices are:
A) move and capture food
B) create and exchange genetic material
C) Store and regulate water
D) make and store energy

Answers

Answer:

A) move and capture food

Explanation:

Amoeba is madeup of single cell and having a true nucleus or membrane around the nucleus. Amoeba belongs to kingdom protista because it has some characteristics of animals such as it can move from one place to another. Amoeba used phagocytosis which is a type of endocytosis in which large substances are entered into the cell. Pseudopod is part of amoeba body which is responsible for the movement and capturing the food.

When genes are shared across two different organisms we refer to this as an event of

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The  answer is; horizontal gene transfer


The other form of gene transfer is the vertical gene transfer where genes are transfers from parents to offspring. Horizontal gene transfer is common in bacteria and is significant in transferring favorable genes such as antibiotic resistance in a bacteria population. An example of this horizontal gene transfer in bacteria is conjugation and transformation.  
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