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poizon [28]
3 years ago
13

Organisms that reproduce sexually recieve genetic material from both parents when fertilization occurs. The development of the z

ygote into a multicellular organism is the result of
a) meiosis followed by mitosis
b) mitosis and cell differentiation
c) meiosis and cell differentiation
d) protein synthesis followed by meiosis
Biology
1 answer:
Lena [83]3 years ago
3 0

Answer:

The correct answer is option b, that is, mitosis and cell differentiation.

Explanation:

A zygote refers to the outcome of fertilization. The diploid zygotes go through the process of mitosis and differentiation in order to generate the embryos. The differentiation of cells at the time of embryogenesis is essential for the cell, organ, tissue, and organism identity.  

Once the process of fertilization takes place, that is, the fusion of sperm with the egg, the development of zygote takes place. The zygote differentiates into various kinds of cells by the process of mitosis, initiating the beginning of embryonic differentiation.  

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What can usually be determined by observing an organism?
Shtirlitz [24]

Answer: A. Phenotype

Explanation:

Phenotype: the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

Genotypes produce phenotypes.

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3 years ago
Which of the following may cause allergies? Animal dander Exercise Poor sleep Stress
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Animal dander would be the answer you're looking for. 
 
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4 0
3 years ago
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The half — life of nickel is 96 years. How much of a 30-gram sample is left after 270 years?
-Dominant- [34]

The amount of the 30 gram-sample that will remain after 270 years is 6.61 grams

<h3>How to determine the number of half-lives </h3>

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

  • Half-life (t½) = 96 years
  • Time (t) = 270 years
  • Number of half-lives (n) =?

n = t / t½

n = 270 / 99

n = 2.8125

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 30 grams
  • Number of half-lives (n) = 2.8125
  • Amount remaining (N) =?

The amount remaing can be obtained as follow:

N = N₀ / 2^n

N = 30 / 2^2.8125

N = 6.61 grams

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5 0
1 year ago
Which statement best describes a keystone species
professor190 [17]

The answer is D

One way to remember this is when you are building a bridge there is one piece right in the middle that keeps the whole thing from collapsing that is called the key-stone. If a keystone species goes extinct then the rest of the ecosystem will crumble around it.

5 0
3 years ago
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Estas de acuerdo con la aplicación del principio de la física en ecología:¨la energía no desaparece ni se destruye, solo se tran
saveliy_v [14]

Answer:

Esta afirmación es correcta ya que la ley de conservación de la energía es también aplicable a sistemas vivos  

Explanation:

La ley de la conservación de la energía (la cual es la primera ley de la termodinámica) indica que la energía no se puede crear ni se puede destruir, solamente se transforma, de un tipo a otro. La ley de la conservación de la energía es de vital importancia para entender la existencia del mundo natural. En ecología, la energía fluye de un nivel trófico a otro en forma de biomasa, es decir, dentro de la cadena alimentaria. Esta energía no se puede crear ni destruir sino que es almacenada en los organismos, los cuales representan sistemas abiertos que intercambian materia y energía con el medio. Una vez dentro del organismo, una parte de esta energía es transformada (en plantas, por ejemplo, la energía es convertida en enlaces químicos durante la síntesis de carbohidratos), mientras que otra parte de la energía se elimina al exterior (por ejemplo, se disipa en forma de calor), pero la energía no se crea ni se destruye.

3 0
3 years ago
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