Answer:
they are heterotrophic and can produce their own food unlike things like microbes who rely on other things to live. they are also multicellular unlike most bacteria (mushroom is an exception)
So a change in an organism's DNA can cause changes in all aspects of its life.Mutations<span> are essential to </span>evolution<span>; they are the raw material of genetic variation. Without </span>mutation<span>, </span>evolution<span> could not occur.</span>
21. The smaller organelle is the ribosome.
Answer:
Option (C).
Explanation:
VEGF (Vascular endothelial growth factor) acts as a signalling molecule for the platelet derived growth factors. Paracrine signalling helps in the cell communication of the near by cells.
VEGF can acts as the paracrine signalling molecule. They have the ability to binds with receptor and can cause the formation of new blood vessels to their by neighbor cells also.
Thus, the correct answer is option (C).
Answer: The correct option is A (detritus).
Explanation:
The sea star also called the star fish belongs to the phylum echinodermata. They are slow moving marine animals living on the sea-shores and sea beds. They possess tube feet under their arms which enables them to move to location where they can obtain food.
During feeding, the star fish is capable of pouring digestive enzymes on the soft tissue of its prey. Once liquefied, it absorbs it into its stomach. The following are the different types of food that a star fish can feed on:
--> coral,
--> sponges,
--> clams,
--> oysters,
--> sand dollars, and mussels
They also feed on dead or decaying debris of different plants and animals. These dead or decaying debris are also called DETRITUS. A detritus is made up of leaves and other plant parts, animal remains and waste organic products that fall into water bodies from the kelp forests along the North American coastline.
