The bloody-heart lichen is composed of a fungus and an alga. The alga makes food through photosynthesis and the fungus encloses the alga, providing support. What kind of relationship is this?
A
competitive
B
commensal
C
mutualistic
D
parasitic

D Parasitic

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the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.