Answer:
The cells present in the stem are part of the xylem and phloem conductive tissues. They are characterized by being elongated and in tubular form because they transport the substances, the xylem transports water and inorganic mineral sales that the root absorbs from the soil. The phloem is responsible for transporting substances synthesized in photosynthesis.
Its tubular and elongated shape facilitates the transport of these substances
Answer:
a mucus or a gelatinous sheath
Explanation:
Most species of cyanobacteria are enclosed in a gelatinous sheath which is made up of proteins.
Answer:
i belive it is A
Explanation:
i am not at all positive so dont come at me but hopefully this helps
Answer:
i believe its B but i might be mistaken.
Explanation:
Answer:
- Cell mediated immunity uses what type of WBC to attack and kill the infected cell? <u>T-cells</u>
- <u> Helper T </u>or <u>Killer T cells</u> are released that cause the cell to lyse or <u>undergo apoptosis.</u>
Explanation:
White blood cells or leukocytes are integral to cell-mediated immune function in the human body. T cells are produced in bone marrow, and mature in the thymus. They recognize antigens on virus-infected cells and target them for attack; antigens and receptors fit together to allow for identification.
- Helper T cells aid in activating other immune cells, along with eliminating cells infected by pathogens; they release cytokines
- Killer T cells produce special toxins (perforins and then cytotoxins) that lead to cell lysis and programmed cell death or apoptosis.