Platyhelminthes (phylum Platyhelminthes), also known as flatworms, are bilaterian, unsegmented and soft-bodied invertebrates. Platyhelminthes are hermaphroditic organisms with internal fertilization. In addition, this group shows a series of characteristics including 1-a ladder-like nervous system, 2-presence of parenchyma in the body cavity, and 3-flame cells, i.e., specialized excretory cells that function like a kidney. Platyhelminthes can be divided into three groups: Turbellaria (generally found in freshwater), Trematoda (generally parasitic), and Cercomeromorpha (exclusively parasitic).

8 0

3 years ago

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry into the bo

Dmitry [639]

I think the answer is C

8 0

3 years ago

A researcher while working in vitro (outside cell) added helicase enzyme which resulted in the untwisting of the DNA helix. But

Nadusha1986 [10]

The answer is <span>Topoisomerase.

Topoisomerase is an enzyme responsible for twisting of DNA helix. After DNA strand is untwisted by helicase enzyme, DNA must be twisted again so the normal function of DNA can be sustained. If left untwisted, the replication fork will continue to grow, the normal function of DNA will stop.</span>

7 0

3 years ago

Can u help me please​

Can u help me please