1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kicyunya [14]
3 years ago
7

Viruses

Chemistry
2 answers:
sdas [7]3 years ago
8 0

Answer:

C are part of the Protista kingdom

Explanation:

The Protista, or Protoctista, are a kingdom of simple eukaryotic organisms, usually composed of a single cell or a colony of similar cells. Protists live in water, in moist terrestrial habitats, and as parasites and other symbionts in the bodies of multicellular eukaroytes.

Other eukaryotic kingdoms—the Plantae, Fungi, and Animalia—are each believed to be monophyletic . That is, all plants evolved from one ancestral plant, all animals from one ancestral animal, and all fungi from one ancestral fungus. The Protista, however, are not; they are almost certainly polyphyletic and did not arise from a single ancestral protist. Rather, the Protista are a category of miscellaneous eukaryotes, not closely related to each other and not sharing many characteristics, but not fitting any other kingdom of life. Some authorities divide the Protista into as many as twenty-seven phyla, and some feel the Protista should be discarded as a kingdom name, and these organisms divided into as many as twelve kingdoms.

Historically, the Protista were divided into three main categories: the plantlike algae, animal-like protozoans, and funguslike slime molds. This classification persists in many elementary textbooks; however, current molecular evidence indicates that these are not natural groups related by common descent, but groups with merely superficial , deceptive similarities.

Classifying them together is probably no more scientific than it would be to classify bees, birds, and bats in one group simply because they all have wings and fly. The two flagellated protozoan groups called trypanosomes and dinoflagellates, for example, are probably less related to each other than a human is to a fish. Genetic evidence (base sequences in their mitochondrial deoxyribonucleic acid [mtDNA] and ribosomal ribonucleic acid [rRNA]) now indicates that the following are more natural (evolutionarily related) groups of Protista.

These are the most primitive protists. Some lack mitochondria and suggest what the first eukaryotes may have been like, while others have primitive mitochondria that closely resemble bacteria. Some basal Protista without mitochondria are Trichomonas, a vaginal parasite of humans; Giardia, an intestinal parasite; and Entamoeba, the cause of amoebic dysentery. The lack of mitochondria is not necessarily the primitive (original) condition of all these protists, however. Although Giardia lacks mitochondria, it does have mitochondrial genes. Apparently it once had mitochondria, and these genes transferred to its nuclear DNA before the mitochondria were lost.

Basal Protista with mitochondria include Trypanosoma, a genus of blood parasites that cause African sleeping sickness and other diseases; Euglena, a green freshwater flagellated protozoan with chloroplasts; and Physarum, a common terrestrial slime mold.

pls give brainiest my hand hurts ;-:

Lelechka [254]3 years ago
7 0

Answer:

just see it it will help trust me its my school work

Explanation:

Download pdf
You might be interested in
Which statement describes the charge distribution and the polarity of a CH4 molecule?The charge distribution is symmetrical and
Alex
  • The charge distribution in a CH₄ molecule is symmetric.
  • CH₄ molecules are nonpolar.
<h3>Explanation</h3>

A CH₄ molecule has four C-H bonds. Each of the C-H bonds is weakly polar. However, the molecule has a tetrahedral shape. The shape itself is symmetric.

As a result, charges on the four C-H bonds have a symmetric distribution. They cancel out within the molecule. Overall, the molecule is nonpolar.

5 0
3 years ago
Read 2 more answers
Rank the following hydroxides in order of increasing aqueous basicity: Al(OH)₃, (OH)₃, In(OH)₃
vovangra [49]

The correct answer is B(OH)3 <AI(OH)3 < In(OH)3.

The metallic character of the group 1 elements first increases from Boron to Aluminium, then decreases from Aluminium to Thallium because of high ionization Enthalpy. Also, the larger size of the ion, the lesser is the ionization of Enthalpy.

Basic nature of the hydroxides of group 13 increases on moving down the group as the electro-positive character of elements increases.

Therefore, the correct order of increasing aqueous basicity is as follows:

B(OH)3 <AI(OH)3 < In(OH)3

What is the basic nature of group 13?

The metallic charecter of the elements affects their fundamental characteristics. The basicity rises as the metallic character does, and vice versa. Therefore, as we move lower in any given group, the atomic radius of the elements increases. Higher radii indicate that it would become increasingly challenging for the nucleus to rule over the electrons in the valency shell. Consequently, there will be a greater inclination for electron release. As a result, the metallic properties will improve, increasing the basicity of the oxides. Therefore, it follows that the basicity of the oxides would rise as we go down in a group.

To learn more about hydroxides refer the link:

brainly.com/question/10134219

#SPJ4

7 0
2 years ago
How an air mattress supports the weight of a person lying on it
kari74 [83]
<span>The pressure on the inside of the mattress from air particles matches the force applied from the body.</span>
4 0
3 years ago
What is the charge of a bromine ion?
Lorico [155]

Answer:

1.0.0

Explanation:

The bromine atom (Br) accepts one electron and forms the bromide ion (Br-), which carries a unit negative charge. Thus, the charge of the bromide ion is -1. 0.0.

hope this helped!

4 0
3 years ago
An atomic number stands for the number of _____. neutrons in the nucleus of an atom protons in the nucleus of an atom valence el
Effectus [21]

Answer:

atoms or electrons

Explanation:

but l guess electrons is the best answer

5 0
3 years ago
Other questions:
  • Can someone plz help me
    10·2 answers
  • Solids and liquids have both mass and volume, but a gas has only mass.
    10·1 answer
  • Help me with 15 16 17 and 18 please thank you so much
    15·2 answers
  • 12.23 g of ammonia (NH3) are dissolved in enough water to make 560.0 mL of solution. How many moles of NH3 are added to the wate
    14·1 answer
  • Of the following solutions, which has the greatest buffering capacity?
    10·1 answer
  • When Hg2+ concentration is 6.35x10^-4 M, the observed cell potential at 298K for an electrochemical cell with the following reac
    15·1 answer
  • Cómo se llama la sustancia pura que está compuesta por lo menos de dos átomos los cuales pueden ser iguales o distintos?
    8·1 answer
  • The only sure evidence for chemical reaction is
    5·2 answers
  • When heated zinc carbonate decomposed to form zinc oxide and carbon dioxide gas how do you knke decomposition is complete
    8·2 answers
  • How many significant digits are there in the number 46.32104?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!