Answer:
It is called pen and it is located at the dorsal side
Explanation:
Squid belongs to the class Cephalopoda, subclass Coleoidea which is characterized by internal shell (unlike subclass Nautiloidea in which shell is located externally).
The shell of the squid (the pen) in very reduced and small, formed from chitin and located at the dorsal side. The pen provides attachment for muscles and it gives the squid stiffness.
Most likely, this internal shell evolved from the external shell, because it is believed the ancestral of the organisms from the Coleoidea was probably nautiloid-like.
<h2>B) is the correct option </h2>
Explanation:
In the given hypothetical condition roosting areas in buildings of any height are the fundamental niche of both bat species
- Niche is the role played by an organism that how they can live in an environment including their diet and shelter
- Fundamental niche represents all the environmental conditions where a species is able to live or can live
- There is no ecological barriers in case of this type of niche
- Since both bat species 1 and 2 can roost in buildings of any height this means there is no ecological barrier and heights of building represent all the conditions where bat species can live so it clearly represents fundamental niche
The best way would be DNA
Answer:
"The smallpox vaccine does not contain smallpox virus and cannot spread or cause smallpox. However, the vaccine does contain another virus called vaccinia which is live in the vaccine. Because the virus is alive, it can spread to other parts of the body or to other people from the vaccine site."
[Copy and pasted from a medical website]
