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avanturin [10]
3 years ago
8

If you found a singled-celled organism with a nucleus, circular chromosomes, and the ability to live in extremely salty habitats

, you would classify it as a member of the Eukarya. True or false?
Biology
1 answer:
babunello [35]3 years ago
4 0

Answer:

False

Explanation:

Carl Woese suggested the classification system in which he divided the organisms into three domains: Archaebacteria, Eubacteria and the Eukaryotes.

In this domain, the domain archaebacteria are the domain which comprises of the organisms which share features of the other two domains.

In the given question, the provided characteristic features like the circular chromosome is a feature of the prokaryote, the habitat is extremely salty which is a characteristic feature of the archaebacteria but the presence of nucleus is a characteristic feature of the eukarya but the prokaryotes do not possess a well-defined nucleus but they possess nucleus like envelope.

Since the eukaryotes do not possess circular chromosomes therefore false is the correct answer.

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_____ communicate information in the opposite direction, from the brain and nervous system to muscles and glands.
yulyashka [42]

Answer:

The correct answer would be efferent neurons.

Efferent neurons are the motor neurons which communicate information in the opposite direction as compared to the afferent neurons, that is, they communicate information or response impulses from the brain or central nervous system to the muscles or glands.

The response impulses results in the movement of the muscles or activation/deactivation of certain gland

In contrast, afferent neurons are the sensory neurons which carry impulses from the receptors to the central nervous system.

5 0
3 years ago
What would happen if DNA didn't have a backbone?
Ronch [10]
It would fall apart, leading to cancer.  Please mark Brainliest!!!
7 0
3 years ago
When an enzyme is functioning at vmax, the rate of the reaction is limited by?
mestny [16]
I guess because of concentration.....it stops !
5 0
3 years ago
Describe one type of factor that controls cell division.
irina [24]
The cell cycle is controlled by many cell cycle control factors, namely cyclins, cyclin-dependent kinases (Cdks) and cyclin-dependent kinase inhibitors (CKIs). Cyclins and Cdks, which are positive regulators of the cell cycle, activate cell cycle factors that are essential for the start of the next cell cycle phase.

Factors Affecting Cell Division
Nutrients. The nutrients present in the cell affect cell division. ...
Genetics. Genetic code regulates cell division. ...
Chemicals. Exposure to toxic chemicals such as pesticides and some cleaning chemicals can cause cell mutation. ...
Stress. Stress affects cell division.
7 0
2 years ago
The EKG is hooked up, and Mr. M's trace looks very abnormal. His heart rate is low. The T wave, which indicates repolarization o
azamat

Answer:

This question lacks options, options are: Mr. M's cells are depolarizing too easily. Blocking Nat channels will make it harder for them to depolarize, bringing their sensitivity back to normal O Mr. M has too little K* leaving his cells, so we need to block the Nat channels so the Kt channels can stay open and his cells can repolarize properly. Mr. M has too little K* leaving his cells, so we need to block the Nat channels so the Na /K+ ATPase can move Kt out of the cell effectively O Blocking Na* channels cannot help- it will only make his cells fire less, and he already has a weak heartbeat. Mr. M's cells are not repolarizing properly. Blocking Nat channels will help them repolarize normally, bringing their resting potential back to normal.

The correct answer is ''Mr. M's cells are depolarizing too easily. Blocking Na+ channels will make it harder for them to depolarize, bringing their sensitivity back to normal.''

Explanation:

Calcium administration is an emerging treatment modality aimed at restoring the transmembrane electrical gradient of cardiac myocytes. It probably achieves this goal by reducing the resting membrane potential of cells. Calcium antagonizes the effect of hyperkalemia on cardiac conduction, that is, it antagonizes the effects of K on the heart. Its onset of action is immediate, in a few minutes. Calcium gluconate antagonizes the excitability of the cardiac membrane, that is, it decreases the excitability of the membrane and it does not affect serum levels, it is generally accepted that calcium should be administered when there are ECG changes associated with hyperkalemia.

6 0
3 years ago
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