With the development of the heliocentric model<span> by Nicolas Copernicus in the 16th century, the sun was believed to be the </span>center<span> of the </span>Universe<span>, with the planets (including </span>Earth<span>) and stars orbiting it.</span>
Answer:
Mastax
Explanation:
Rotifers have a small brain, located just above the mastax, from which a number of nerves extend throughout the body.
Answer:
Functions of different cell organelles:
Nucleus: contains all the genetic material, acts as information center and tells all the organelles what to do, RNA transcription.
Mitochondria: generates energy through respiration
Endoplasmic recticulum (rough): transport and storage of material; (smooth ER): creation of lipids and fats
Ribosome: protein creation by RNA translation
Golgi apparatus: responsible for synthesis, packing and processing of proteins
Chloroplast: responsible for glucose creation (by photosynthesis)
Cytoplasm: is region where all chemical reactions take place and is the jelly like fluid that holds all the organelles in place inside of the cell
lysosome: responsible for breakdown of larger molecules
Flagellum (or flagella): tail like organelle, assists motion
Vacuole: helps in maintenance of homeostasis and stores waste products or other materials like water / food
cell membrane: separates cell from the rest of the environment and controls what comes in and out of the cell
cytoskeleton: supports cell structure
There are a number of other organelles as well but i just named some of the common ones.
How do they form? What causes them to form?
Answer:
D
Explanation:
Archea and bacteria have cell walls. Plants in Eukarya domain has cell walls