The thin tubes that form between the centrioles during mitosis are the spindle fibres. Spindle fibers originates from a protein structure that divides the genetic material in a cell. They are necessary for the equal division of the chromosomes in a parental cell into two daughter cells during bth types of nuclear division (mitosis and meiosis). During the process of mitosis they are called mitotic spindles.
Answer:
1. chondrichthyan
2 lateral line system
3. lobe fins
4 operculum
5 ray finned fish
6 swim bladder
Explanation:
A fish with a flexible cartilage skeleton is defined as a chondrichthyan
A lateral line system is a column of organs that are sensitive to small change in water pressure
Fish with strong pectoral and pelvic fins with rod-shaped bones are known as lobe fins
The operculum movement helps certain fish to breathe without swimming.
A fish with a bony skeleton and long, flexible fins is defined as ray-finned fish
A swim bladder is the gas-filled bag used in several fishes.
Answer:
A food web consists of many food chains. A food chain only follows just one path as animals find food. eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web shows the many different paths plants and animals are connected.
Explanation:
Black death, also known as the bubonic plague was one of the worst pandemics that ever happened, killing around 1/3 of Europe's population. It spread to Europe in the mid 1300's from China.
Black death victims were treated through magic, witchcraft, prayer and other methods. As for the two other options, they used medicine, but not antibiotics and radiation hadn't been discovered yet (it was discovered in the 1900's)