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skad [1K]
3 years ago
8

Select the correct answer.

Biology
1 answer:
stepladder [879]3 years ago
7 0

Options are not provided in the question, so the complete question is as follows:

In the three domain system, the domain Eukarya consists of all organisms that have which of the following?

A. Contractile vacuole

B. Nucleus

C. Chloroplast

Answer:

B. Nucleus

Explanation:

The three domain system include archaea, bacteria, and eukarya.

Eukarya, consists of all organisms whose cells have a nucleus. Eukarya contains multicellular and visible organisms, such as animals, people, plants and trees.

Bacteria and arachaea contains unicellular organisms and lack a nucleus.

Hence, the correct option is B. Nucleus.

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Describe the Plum Pudding Model of the atom
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Answer:Thomson's model showed an atom that had a positively charged medium, or space, with negatively charged electrons inside the medium. Soon after its proposal, the model was called a "plum pudding" model because the positive medium was like a pudding, with electrons, or plums, inside. Thomson developed what became known as the "plum pudding" model in 1904. Plum pudding is an English dessert similar to a blueberry muffin. In Thomson's plum pudding model of the atom, the electrons were embedded in a uniform sphere of positive charge like blueberries stuck into a muffin.

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3 years ago
Help please.<br> Biology.
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Answer:

for the first it could effect how much the baby weighs or how healthy they are depending on what you eat as for the second No they will not it is impossible because those happened before the baby was born so it is in NO way possible for the baby to inherit these traits

Explanation:

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3 years ago
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During the process of allopatric speciation, after geographic separation has occurred, what process would be a necessary last st
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Answer:

Occurrence and accumulation in time of new mutations in each of the separated populations. This leads to a gradual differentiation.

Explanation:

Allopatric speciation consists of the geographic separation of an original population so that it can give place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate populations, or geological events. In this speciation, some barriers impede genetic interchange, or genetic flux, as the two new populations that are separated can not get together and mate anymore. These barriers might be geographical or ecological.

The process of allopatric speciation involves different steps:

  • The emergence of the barrier,
  • Interruption in the genetic interchange,
  • The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation,
  • Genetic divergence by natural selection and reproductive isolation, which makes it impossible for the two groups to cross even if the barrier disappears,  
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How can we explain why there is so much biodiversity on Earth today? How did it come about?
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Answer:

How can we explain why there is so much diversity of life on Earth today?

There are several key reasons for high biodiversity in tropical ecosystems. High NPP directly contributes to α-diversity by supporting more species with minimum viable populations, whereas enlarged populations of each organism increase overall mutation frequency and hence intraspecific genetic variation.

Explanation:

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Which organism would MOST LIKELY be the main source of oxygen in a forest ecosystem?
babunello [35]
C) oak trees.....................................................................................srry needed 20 characters. 
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