Answer: Yes.
Explanation: Microtubules are part of the cytoskeleton, a structural network within the cell's cytoplasm.
Answer:
Clusters of cocci (i.e., grape-like cocci)
Explanation:
Cocci (in singular coccus) are spherical-shaped bacteria, while bacilli and spirilli are rod-shaped and spiral-shaped bacteria, respectively (in general, bacteria can be divided into these three categories by shape). <em>Staphylococcus aureus</em> forms irregular clusters of cocci (i.e., grape-like cocci) when viewed through a microscope. Some Gram-positive cocci include, for example, <em>Staphylococcus aureus</em> and <em>Streptococcus pneumoniae</em>. These species are well known to be bacterial pathogens capable of infecting humans.
Different structures and functions of roots
Explanation:
Roots are the underground descending non-green part of the plant.
Root functions: Anchorages the plant to the soil, absorbs water and nutrients from the soil.
Characteristics: Positively geotropic and hydrotropic, negatively phototropic; does not have nodes, internodes or stems.
Types:
- Tap root
- Adventitious root – fibrous, foliar and true adventitious roots
Structure and functions:
- Root cap or Calyptra: Cap-like structure covering the root tip
.
- Function: protects the meristematic tissues of the root, secretes mucilage which enhances the root tips to grow into the hard soil.
- Meristematic zone or growing point sub-terminal behind root cap. These cells are inverted and looks like a dome.
- Function – helps in the root growth by adding new cells to the root tip and other basal regions
- Zone of elongation behind the meristematic zone.
- Function – helps in elongation of the root
- Root hair zone: This is the zone of differentiation where cells differentiate into vascular tissues like phloem, xylem, endodermis, cortex etc.
- The main function of root hair is to increase the total surface area of root to facilitate more absorption of water and other nutrients from the soil
- Zone of maturation: the major and mature portion of a root.
- Function - lateral roots originates from this zone and radial differentiation leads to secondary growth.
Answer:
Macrophages
Explanation:
Macrophages can be defined as a phagocytic leukocyte that can engulf a foreign bacterium.
They are cells found in the immune system as mobile white blood cells that are usually develop in response to a dead or damaged cells and even in cases of an infection.
Answer:
the pepsin produces pepsinogen and the pepsinogen also peptides
