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sertanlavr [38]
3 years ago
14

. Why do astronomers and other scientists believe that there may be a black hole at the center of the Milky Way?

Biology
1 answer:
LekaFEV [45]3 years ago
4 0
Because their is a black substance maybe a black hole
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According to the phylogenetic tree, which domains are more genetically related?
quester [9]

Answer: The correct answer is- Archaea and Eukarya.

As per the information about the (phylogenetic tree) given in the question,

the last branch of the phylogenetic tree begins with the line of Eukarya and then holds the species of the Archaea division, which includes those prokaryotic organisms that live in extremely harsh environmental conditions ( such as Methanobacterium, and extreme halophiles).  

As this last branch holds species of two domains ( from 3 domain system of classification that includes Bacteria, Archaea, and Eukarya) , which are Archaea and Eukarya as it begins with Eukarya and later on holds the species of Archaea.

Thus, it shows that Archaea and Eukarya are more genetically related.

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3 years ago
The various taxonomic levels (e.g. genera, classes, etc.) of the hierarchical classification system differ
Westkost [7]

Answer:

(c) their inclusiveness.

Explanation:

The taxonomic classification has eight levels, they go from the more inclusive to the more exclusive.

The eight categories are: <u>Domain</u> which  is the most inclusive level, that is to say, that the largest number of individuals are included in this level. There are  three domains according to the cells types, and where they live. They are the Eukarya, Bacteria and Archaea. Domains are divided into <u>kingdoms</u>, they are the Plantae, protista, Eubacteria, Archaebacteria,  Animalia and Fungi. After kingdoms the <u>Phylum</u> category comes, following Phylum is <u>Class</u>, various classes that are related will form a Phylum. The next category is <u>Order</u>, order is divided into <u>Family,</u> families are broken into <u>Genus</u>, where species are closely related between each other and finally the last category is <u>Especies identifier,</u> in this group there are unique characteristics that will identify a specie. With this classification we can see that we go from global groups  to more specifics ones as the classification avances.

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2 years ago
List the four classes of the phylum protozoa and their locomotory organelles​
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Approximately, 50,000 types of Phylum Protozoa have been identified. Its four divisions are Amoeboid Protozoa or Sarcodines, Flagellated protozoans or Zooflagellates, Ciliated protozoa or Ciliates and the Sporozoans.

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3 years ago
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A random sample is one way to reduce bias when choosing people for an experiment
Verdich [7]

Your answer is

One of the most effective methods that can be used by researchers to avoid sampling bias is simple random sampling, in which samples are chosen strictly by chance. This provides equal odds for every member of the population to be chosen as a participant in the study at hand.

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