Answer:
-It ensures life on Earth can exist.
-It is used by plants for photosynthesis.
-It is the main component of many biological components, including blood.
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Answer:
una propiedad que varía y la otra que permanece constante cuando la onda pasa de un medio a otro. Las dos propiedades son: i) Longitud de onda ii) Frecuencia
Explanation:
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Answer:
In humans, genetic variations are caused because humans reproduce by a sexual life cycle which is termed as meiosis. In such a life cycle, the offspring receives half the chromosomes from the mother and half from the father. Crossing over and random assortment of chromosomes are two phenomenons which occur during meiosis. Due to these two phenomenons, genetic variations are caused.
During crossing over, the exchange of DNA segments between the homologous chromosomes takes place which brings about the genetic variations.
<span> In </span>animal cells centrioles<span> organise the pericentriolar material to produce microtubules including mitotic spindle fibres.</span><span />
