Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.
Answer:
Los detritívoros
Explanation:
Los detritívoros son organismos que se alimentan tanto de plantas como de animales en descomposición (detritos). Los organismos detritívoros representan un componente fundamental de los ecosistemas ya que de ellos depende el reciclaje de nutrientes en los ciclos biogeoquímicos. Los detritívoros incluyen bacterias (por ej., bacterias nitrificantes claves en el ciclo del nitrógeno), animales (por ej., la cochinilla de la humedad, lombrices, etc) y hongos saprófitos (por ej., <em>Fomitopsis pinicola, Fomes fomentarius</em>, los cuales crecen sobre la madera y/o sus restos). Los detritívoros se encuentran en todos los tipos de ecosistemas y tienen un rol fundamental en la cadenas trófica mediante su activa participación en los ciclos biogeoquímicos, especialmente en el ciclo del nitrógeno.
The correct answer is - B. Mitosis produces two diploid daughter cells, while meiosis produces four haploid daughter cells.
The processes of mitosis and meiosis are often confused with one another, mostly because of the similarity in their names.
The mitosis is a type of cell division where the end result is two daughter cells, each of the cells has the same number and kind of chromosomes as the parent nucleus. Thus is typical for the growth of tissue.
The meiosis is a type of cell division where the end result is four daughter cells, each of the cells having half the number of chromosomes of the parent nucleus. This is typical for the gametes and the plant spores.
Answer:
Allele
Explanation:
An allele is a variant form of a gene
Answer: Microfilaments assist with cell movement and are made of a protein called actin. Actin works with another protein called myosin to produce muscle movements, cell division, and cytoplasmic streaming. Microfilaments keep organelles in place within the cell.
Explanation: