Answer:
DNA ligase,joins the okazaki fragments together into a single DNA molecule
Answer:
lymphocytes
Explanation:
In immune system, there are three main group of cells that is the response of our defenses.
Neutrophils are one group responsible to be the first response, they travel all around our body trough the stream blood and can detect the first signals of infection.
Monocytes and macrophages, are another group of cells that can "eat" the bacteria or viruses and destroy them when they are inside our body.
The third group, the lymphocytes, are conformed by three group of cells, T - cells (that help to destroy infected or cancerous cells), B- cells (responsible to produce antibodies, so they are the ones that conformed our second barrier of defense) and the NK cells ( natural killers, the ones to control several types of cancer and microbial infections).
Hope this info is useful.
Answer:
Cnidaria
→ Organisms have specialized stinging cells
→ Two type of body plans exist - polyp and medusa
Porifera
→ Organisms lack symmetry
→ Adult forms are sessile
→ Organisms obtain food by filtering water
→ Phenomenon of alternation of generation is observed.
Explanation:
Cnidaria, also known as the coelenterata, is a phylum of mostly marine animals having about 9,000 living species. Some of them include the corals, hydras, jellyfish, sea anemones, sea whips, etc. They possess specialized cells known as cnidocytes ( also known as “stinging cells”). These cells can seen around the mouth and tentacles cnidarian. They immobilize their prey with toxins. These Cnidaria have two body plans and which are polyp and medusa.
The phylum Porifera are known as the pore bearers. It has about 5000 species. Their adult forms are sessile. They live permanently attached to rocks. They can under alternation of generation. They possess no organs in their bodies. Also, they lack symmetry. They can be referred t as filter feeders because they obtain food by filtering water.
