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SOVA2 [1]
4 years ago
14

Black widow spiders are considered the most venomous spiders in North America. They are roughly 1.5 inches long. Black widows ha

ve a life cycle of one to three years. Is a black widow spider a vertebrate or an invertebrate? Be sure to justify your answer.
Biology
2 answers:
IRISSAK [1]4 years ago
8 0

Answer:

A black widow spider is classified as an invertebrate. It does not have a backbone or internal skeleton. It has an exoskeleton. The life cycle for the black widow spider is short.

Explanation: I took the test and this was the sample response.

Zolol [24]4 years ago
7 0

The black widow spider is an invertebrate. Its skeleton system hangs outside its body. The only difference between a vertebrate and invertebrate is the presence of backbone or a similar kind of structure with in the body. In case of black widow spider, the internal structural element is missing.  Its skeleton system can be classified as exoskeleton.  

 

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If the nucleus of this cell has 84 chromosomes, how many chromosomes would this cell’s sperm cell have? A: 168. B: 84. C: 42. D:
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Answer:

C. 42

Explanation:

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3 years ago
For accuracy and clarity, the initial point of reference for body regions or parts is anatomic position. An individual is in thi
fgiga [73]

This should be the answer.

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  2. UP,
  3. STRAIGHT
  4. ERECT,
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<h3>What is the anatomic position?</h3>

The anatomic position refers to the position in which a person is standing upright facing the observer, feet parallel and flat on the floor, and palms facing forward. The upper limbs are at the body’s sides with the palms facing forward.

Thus, this could be the answer.

To learn more about  anatomic position click here:

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