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3 years ago

Protists can be:________.

Biology

1 answer:

PilotLPTM [1.2K]3 years ago

3 0

Answer:

e) unicellular, colonial, or multicellular.

Explanation:

Protists originates from the Kingdom Protoctista. They comprise of organisms that are unicellular (Amoeba) or unicellular-colonial (volvox) in nature and which have no tisssues, therefore they are at the cellular level of organization.

Examples include, Amoeba, Paramecium, Euglena, Slime mold, Kelp, Diatoms, DInoflagellates. etc.

Some of them are also considered to be multicellular eukaryotes e.g slime molds, red algae etc. Eukaryotic organisms are organisms that possess cells containing a nucleus.

Characteristics in which protists exhibit varies from one species to the other.

For example, the mode of nutrition in eukaryotic algae are autotrophic in nature, in amoeba, they are gifted with pseudopods(false feets) in which they used to engulf prey(a term known as phagocytosis) therefore making them to be heterotrophic in nature.

In protist, locomotion varies from one organism to another. For example, in Amoeba , locomotion is achieved by extending and retracting pseudopods, Euglena are flagellated in nature , hence they move with the flagella. In Paramecium that are ciliated in nature, they move by propelling their cilia. etc.

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Which of the following traits do archaeans and bacteria share?

alex41 [277]

Answer:

The correct answer is: E) both B and C.

Explanation:

Bacteria and Archaea forms two distinct and different Domains in the Taxonomic classification system.
Nuclear envelope that surrounds and protects the genetic material by forming the Nucleus is absent in both Archaea and Bacteria. Both of them possess a region called the Nucleoid where their genetic material is located.
Plasma membrane that surrounds the cell and maintains integrity of the cell structure is present in both Bacteria and Archaea. Although the composition of lipid in the plasma membrane is different in each.
However, they vary in their cell wall composition. The cell wall of the bacteria is rich in a compound called peptidoglycan while the cell wall of archaea lacks peptidoglycan and is rich in polysaccharides and glycoproteins.

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3 years ago

A population of prairie dogs lives at the edge of a meadow.

Shalnov [3]

Answer:

B. They belong to the same species and C. They live in the same area.

Explanation:

This is an educated guess. If you think about it, if there was a population of humansss, we dont have the same parents nor the exact genes so to only two that make sense is those to （＾ω＾）

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3 years ago

Read 2 more answers

A sound of intensity above -- may cause permanent hearing damage

Blizzard [7]

Answer:

70 decibels and above can cause damage if heard for a long time

120 decibels and above is considered an immediate threat

Explanation:

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3 years ago

In _______________, brain cells are stimulated using a powerful magnetic field produced by a wire coil placed on a person's head

Masteriza [31]

Answer:Transcranial Magnetic Stimulation (TMS)

Explanation:

Transcranial magnetic stimulation also known as repetitive transcranial magnetic stimulation. TMS is a noninvasive procedure that uses magnetic fields to stimulate nerve cells in the brain to improve symptoms of depression. In TMS, brain cells are stimulated using a powerful magnetic field produced by a wire coil placed on a person's head that temporarily inactivates neural circuits. TMS devices operate completely outside of the body and affect central nervous system activity by applying powerful magnetic fields to specific areas of the brain that we know are involved in depression.

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3 years ago

Based on this tree, which statement is correct? A phylogenetic tree of the living organisms. The main branch divides into two br

alexgriva [62]

Answer:

a) Salamanders are a sister group to the group containing lizards, goats, and humans.

Explanation:

A phylogenetic tree is a diagram that represents the evolutive relations between organisms. As you can see in the attached image, the branch that contains salamanders and the group containing lizards, goats and humans, come from the same point as they are in the group 2a and 2b, because of this <em>Salamanders are a sister group to the group containing lizards, goats, and humans.</em>

b) Goats are in the same level as humans because they come from the same point, so they are more close between them than with salamanders.

c) Lizards are more closely related to salamanders than humans, because humans are in an upper branch, then is not true that salamanders are closely related to lizards as to humans.

d) A basal taxon is a lineage that evolved early, so it separates from the tree in an early stage, as it happens to the salamanders that separated early but not humans.

Then the correct answer is a)

<em>Salamanders are a sister group to the group containing lizards, goats, and humans.</em>

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3 years ago