B) Meiosis I separates tetrads, and meiosis II separates sister chromatids.
Chemical digestion involves the breaking down of food with enzymes;
mechanical digestion is breaking down food by chewing and tearing with teeth.
Chemical digestion is the breakdown of fats; mechanical digestion is the breakdown of proteins.
Chemical digestion is done only by the major structures of the digestive system; mechanical digestion is done by the accessory structures of the digestive system.
B) motor oil runoff.
Eliminate
C) ozone depletion.
D) fertilizer runoff.
The answer is C. ozone depletion
The food chain starts with primary producers like plants, consumed by primary consumers (herbivores). They in turn are eaten by secondary consumers (usually carnivores), and so on up the chain to the apex consumers. Decomposers break down dead material at all levels, returning nutrients to the ecosystem.
Organisms residing at various levels of the trophic structure in an ecosystem have different food sources. At the base of the food chain, we have primary producers, typically photosynthetic organisms like plants and phytoplankton. These organisms make their own food using sunlight.
The primary consumers are ordinarily herbivores that directly consume the primary producers. Following them are the secondary consumers, usually carnivores that eat the primary consumers. Similarly, tertiary consumers are carnivores that consume other carnivores.
Further up the food chain we have the higher-level consumers who feed on the lower trophic levels. At the top of the food chain are the apex consumers. Meanwhile, decomposers break down dead producers and consumers, returning nutrients to the soil.
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Answer: The correct answer for the blank is -
Sepal, petal, stamen, and pistil.
Flower is the reproductive structure of flowering plants (angisperms). It is primarily composed of four parts, which are (from outside to innerside) -
Sepals (that together form calyx, the outermost protective whorl)
Petals (that together form corolla, the second whorl)
Stamen (the male reproductive part that together forms androecium, which is the male reproductive organ).
Stamen is further composed of anther (that produces pollen) and filament (stalk like structure, which protects anther).
Pistil (the innermost part that forms gynoecium, which is the female reproductive organ). It is composed of stigma, style, and ovary.
Electromagnetic spectrum is used in electromagnetic technology in making of high-speed trains ,metal detectors,etc.
The electromagnetic spectrum consists of radiation which consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The waves are arranged in decreasing order of energy and decreasing order of wavelength.Gamma rays have the highest energy while radio waves have the lowest energy.
Learn more about electromagnetic spectrum,here:
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Answer:
metal detectors, high-speed trains, electric generators.
Explanation: