Answer:
all of these are echinoderms
Answer:
As the spies of a cactus are modified leaves, they have ar spaces.
Explanation:
However, leaves of cactus are not like every other leaf. These leaves are in the form of spines to save the amount of water that the cactus needs.
Most of the amount of water, cactus s saving in its root. Also, the stem of a cactus is used for making food, and this is also the way of saving the water.
The answer is D, algae.
—Evidence—
•] Protozoan definition: a single-celled microscopic animal of a group of phyla of the kingdom Protista, such as an amoeba, flagellate, ciliate, or sporozoan.
•] it does not feature algae, therefore it’s D.
The benefits of the biotechnological researches posses the same level of threat if they are not regulated. It is essential to set some ethical guidelines to prevent the misuse of the biotechnological researches. the genetically altered organisms posses a harm to the environment if they are mixed with the natural occurring ones. Moreover, the super pathogens and drugs can cause a catastrophe if not handled properly, and can be used in bio-terrorism. Hence, it is essential to follow the rules and take in notice the ethical concerns.
