BIOLOGY MIDDLE SCHOOL

What is the sense???????
what is the sense??????? - 1

Answers

Answer 1
Answer: Essentially, the question is asking you: what sense (Touch, sight etc) deep-sea organism (an animal that lives deep in the ocean) rely on to survive.
In this case i think it would be touch(?) as these organisms mainly rely on vibrations as a mean of communication and navigation. Thus, this is their way of surviving even in the depths of the ocean.

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Does everything that you can see fit the definition for matter

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the definition is: Matter is the Stuff Around You. Matter is everything around you. Atoms and molecules are all composed of matter. 
Matter is everything;Everything is matter

What must happen before chemical reaction can begin

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chemical reaction is a ... molecules of the reacting substances must collide before any potential reaction

Dichotomous Keys and branching diagrams organize different types of information about classification. how are these tools used differently?

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Answer:

In a dichotomous key you named then by their traits while in a branching diagram it already has the name and it's traits.

Explanation:

In dichotomous keys (also called single-entry or single-entry keys), a fixed sequence of alternatives must be followed, where multiple steps (including one or more characters) present two contrasting options (character states). As a result, only a single series of choices results in correct identification. Thus for each taxon there is a specific sequence of steps. An important factor of the dichotomous keys is that through them it is possible to name living beings through their characteristics.

A branch diagram can be used to represent a probability space. It can also be used to represent the various possibilities of a permutation or combination. This type of diagram provides a convenient way to organize information from a set of conditional events. In biology, the branch diagram shows the name and characteristics of a being and its relationship to different beings and characteristics.
To show the different levels of classification and divide among species, and different organisms on planet Earth. It also creates a universal "language" for scientists around the world when referring to organisms (cougar & puma are the same animals; different name)
Example: The American Alligator and the Chinese Alligator (look it up!) are in the same family and genus, but are not the same species.

Which layer of the Earth makes up most of its volume?

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The Outer Core (C) (2270 km), is a molten nickle-iron alloy. The Mantle (B) is approximately 2885 kilometers thick and is the middle layer of the Earth. The Mantle is made up of minerals rich in the elements iron, magnesium, silica, and oxygen. The Mantle makes up approximately ~85% of the Earth's volume.

What types of traits can show genetic variation within a species?​

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Answer:

Types of variation in genetics

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring)

other answer

There are three sources of genetic variation: mutation, gene flow, and sexual reproduction. A mutation is simply a change in the DNA. Mutations themselves are not very common and are usually harmful to a population. Because of this, mutations are usually selected against through evolutionary processes

What is phylum? Explain.

Answers

A principal  taxonomic category that ranks above class and below kingdom
a principal taxonomic category that ranks above class and below kingdom, equivalent to the division in botany.
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