What type of relationship exists between two organisms if both of them benefit from the relationship?

Use the key to identify each species. Write the letter of each species (A to G) in the correct

sveticcg [70]

Dichotomous keys are useful to identify organisms according to their morphological traits. The given key provides enough macroscopic morphological traits to identify these Arachnida species.

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A dichotomous key is a significantly useful tool to classify organisms. The key provides an easy and fast way for identification by describing different morphological traits, leading you to the correct taxonomic classification.

The key provides morphological descriptions about different taxonomic groups in an easy way to identify these traits in your individual.

The term dichotomous refers to how information is provided. You will always have two options (a and b, or 1 and 2), and you will have to choose one of them according to the characteristics of your organism.

In the exposed example, as the key provides morphological traits, we will separate the organisms into two groups:

the group that has the trait
the group that does not have it.

By recognizing each trait in each of the individuals, we will get to identify the species.

1

(a) Abdomen with a tail --------------------------- The only option is E

(b) Abdomen without a tail ---------------------- All the others A, B, C, D, F, G

2 ---Only for group A, B, C, D, F, G---

(a) Legs much longer than abdomen and cephalothorax ----------A and G

(b) Legs not much longer than abdomen and cephalothorax----- B, C, D, F

3 ---Only for group A, G---

(a) Hairs on the legs -----------------------------------The only option is A

(b) No hairs on the legs ------------------------------ G

4 ---Only for group B, C, D, F---

(a) Cephalothorax or abdomen segmented ----------------The only option is D

(b) Cephalothorax or abdomen not segmented ----------- B, C, F

5 ---Only for group B, C, F---

(a) Abdomen and cephalothorax of the same size --------The only option is F

(b) Abdomen and cephalothorax of different size -------B, C

6 ---Only for group B, C---

(a) Body covered with long hair ----------------------------------The only option is C

(b) Body not covered with hair ------------------------------------B

A → Tegenaria domestica

B → Ixodes hexagonus

C → Tyroglyphus longior

D → Chelifer tuberculatus

E → Abaliella dicranotarsalis

F → Poecilotheria regalis

G → Odielus spinosus

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4 0

2 years ago

Scientists believe that the carbon levels in the atmosphere are growing, thus throwing off the stability of the Earth’s atmosphe

professor190 [17]

Answer:

There is overwhelming evidence that human activities, especially burning fossil fuels, are leading to increased levels of carbon dioxide and other greenhouse gases in the atmosphere, which in turn amplify the natural greenhouse effect, causing the temperature of the Earth's atmosphere, ocean, and land surface to

Explanation:

5 0

3 years ago

Which allele combination represents a female who is a carrier for an X-linked recessive disorder?

cupoosta [38]

The allele combination for a female carrier is XRXr

6 0

3 years ago

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Yasmine is asked to describe the structural organization of chloroplasts. She writes the following sentence:

julia-pushkina [17]

Answer:

C. Exchange the positions of "stroma" and "grana."

"A chloroplast contains thylakoid stacks, called grana, that are surrounded by fluid-filled stroma."

Explanation:

A dynamic biochemical process, photosynthesis, occurs within the chloroplasts of plants. Here, to form stable carbohydrates, light energy is transformed into chemical energy.

6 CO2 + 6 H2O + light → C6H12O6 + 6 O2

Carbon Dioxide + Water + Light Glucose + Oxygen

Chloroplasts are tiny, highly-folded, membrane-bounded organelles containing enzymes, pigments and other molecules that mediate photosynthesis. In the stack of grana, pigments like chlorophyll, absorb light energy for the light-dependent reactions.

5 0

2 years ago

Can someone please help me with this

meriva

Answer:ttttttttttttttttttttttttttttttttttttttttttttttttttttttfhfhgfjhgjyhgjhgfgfhttfhgfhgvnbvnbhlj

Explanation:

8 0

3 years ago

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