Pheromones are chemical substances secreted by members of a species to stimulate a response in other individuals of the same species. for example, certain pheromones are secreted by females of a species to attract males for mating. the percent composition of eicosene (280 g/mol), a compound similar to the japanese beetle mating pheromone, is 85.63% c and 14.37% h. determine its molecular formula.

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Any sound above what db can cause hearing loss in human beings

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.