Hello! This is a very interesting sea animal to study. So, most starfish have five arms that radiate from a central disc, but the number varies with the group. Luidia ciliaris has seven arms, members of the Solasteridae have ten to fifteen while the Antarctic Labidiaster annulatus can have up to fifty. It is not unusual in species that typically have five arms for some individuals to possess six or more through abnormal development. That’s really all I know about the anatomy of a starfish. I hope this helps.
If you have further questions please post them in comments. Have a great night!
~Brooke❤️
<span>The rat was taught that when you press the bar you receive food. When the food ran out the rat was still pressing the bar however it wasn't be awarded. The rat then saw that there was no outcome to pressing the button therefore found it to be pointless.</span>
NUCLEUS IS CALLED CONTROL CENTRE OF THE CELL BECAUSE IT PERFORMS TWO MAIN PRINCIPAL FUNCTIONS:
1. Contains genetic information for structure, reproduction , development, metabolism and behaviour. ...
2 Controls cellular activities through directing synthesis of particular proteins and enzymes.
Explanation:
It contains the genetic instructions for every function of the cell. It is the cell's powerhouse and processes energy for the cell. It is responsible for packaging proteins for delivery out of the cells.
Answer: The symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate formation of root nodules, enlargements of plant cells and bacteria in intimate association. Within the nodules the bacteria convert free nitrogen to ammonia, which the host plant utilizes for its development.
Answer:
It does not show the functions of the cell parts.
Explanation:
