Well, flowers give insects like bees and butterflies nectar. That's their food. In return, the insects spread the flower's pollen so that other plants like its type can be fertilized. 
This is mutualism - a symbiotic relationship were two organisms benefit.
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Answer:
Patches of fibrocartilage formed in the healing of a fracture are called <u>soft callus</u>, whereas the bony collar formed around the fracture is called <u>hard callus</u>.
Explanation:
In the fibrocartilage or soft bone callus phase, the necrotic bone is removed by osteoclastia and dead soft tissues are being removed by macrophages. The fibroblasts are activated and a granulation tissue is generated that supposes the appearance of new vessels and, with them, the arrival of more connective tissue cells. A tissue called fibrous callus or fibrocartilage begins to form, composed of a poorly structured amalgam of fibrous tissue, cartilage, and amorphous bone.In hard callus, bone and later cartilage are deposited in the growing historical mass. The two collars of callus,  fixed to the bone at some distance from the fracture, they grow upwards and towards each other, forming an arc  on focus.
 
        
             
        
        
        
Microorganisms play key roles in the cycling of important nutrients in plant nutrition, particularly those of microorganisms play key roles in the cycling of important nutrients in plant nutrition, particularly those of carbon, nitrogen and sulfur.
<h3>
What is Microorganisms?</h3>
Microorganisms, often known as microbes, are minute organisms that can be single cells or colonies of cells.
Ancient texts like the Jain scriptures from India's sixth century BC raised the specter of the potential existence of invisible microscopic life. In the 1670s, Anton van Leeuwenhoek used a microscope to observe microorganisms, which marked the beginning of the scientific study of microbes. Louis Pasteur disproved the hypothesis of spontaneous generation in the 1850s by discovering that bacteria were to blame for food degradation. Robert Koch determined in the 1880s that bacteria were to blame for tuberculosis, cholera, diphtheria, and anthrax.
To learn more about microorganisms visit:
brainly.com/question/6699104
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Protocells are self-organized, spherical collection of lipids. This is the proposed as the stepping stone to the origin life. One of the important qualities of protocells is its self-replicating, using the amphiphilic molecules. This requires repeatable set of chemical events. 
        
             
        
        
        
Answer: Lysosomes 
Explanation:
  Lysosomes is the type of organelles which contain enzymes that breaks down the various fatty acids. As, these enzymes basically work in the less oxygen areas and the low PH region. The peroxisomes absorbed all the nutrient from the cell and they are degraded from the sub-cellular structure. 
The lysosomes is the single membrane that contain the digestive enzymes for breaking all the toxic material such as fatty acids, ethanol and hydrogen peroxide in cells.