15 POINTS!! What is the purpose of a dichotomous key? (Select all that apply.)

Biology

1 answer:

postnew [5]3 years ago

3 0

The purpose of a dichotomous key is to identify organisms

Explanation:

A dichotomous key is a kind of a tool that guides to classify and identify different organisms.

This key as the name indicates - dichotomous- consists of two parts or options to identify a species.

The method utilizes a series of questions/answers with two possible outcomes.

Taxonomically, a dichotomous key is used to basically identify a species or an organism by its scientific name.

All of the natural elements like the plants, animals, birds, etc are identified using this key.

Types of dichotomous key includes nested, linked, branching tree etc.

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How does matter move from a plant to a animal

KonstantinChe [14]

Answer:

Plants extract energy from food molecules the same way animals do — by cellular respiration. When plants do cellular respiration, they produce carbon dioxide and use oxygen just like animals do

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3 years ago

This Roman snail, this cuttlefish, and this mussel have similarities and differences in their body structures. What does the inf

Angelina_Jolie [31]

Complete question:

This Roman snail, this cuttlefish, and this mussel have similarities and

differences in their body structures. What does the information about these

structures tell you about the ancestors of these species?

a) None share an ancestor population because different species cannot share an ancestor population. It is a coincidence that these species have some of the same body structures.

b) The Roman snail and the cuttlefish share an ancestor population, but they must not share an ancestor with mussels because mussels have no radula.

c) All three species share an ancestor population, but Roman snails and

cuttlefish share a more recent ancestor population. This is why they share

the radula structure.

d) We cannot make observations of ancestor populations from the past. It is

impossible to explain ancestors with only the information about the body

structures of different species.

Answer:

The correct answer is option C. All three species share an ancestor population, but Roman snails and cuttlefish share a more recent ancestor population. This is why they share the radula structure.

Explanation:

The three species belong to the mollusk phylum, and to the placophore group.

Each of them belongs to a different class.

The Roman snail belongs to the Gasteropod class,
The cuttlefish belongs to the Cephalopod class,
The mussel belongs to the Bivalve class.

The tree classes share a common ancestor from which all the placophores evolved. Among them, we can mention the monoplacophore, gasteropod, cephalopod, bivalve, and scaphopods. Three branches diverged from this common ancestor. The first one originated the monoplacophore. The second one originated the common ancestor of gastropods and cephalopods. And the third one originated the common ancestor of bivalves and scaphopods. The tree-mentioned species inherited the mantle and the radula from their foreign common ancestor. But later in time, individuals that originated bivalves lost the radulla. This is why the three species have a mantle, but only gastropods and cephalopods have a radula. When each of these classes evolved, they developed their own traits,