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xxTIMURxx [149]
2 years ago
5

FIRST PERSON TO ANSWER GETS BRAINLIEST!!!!

Biology
1 answer:
vichka [17]2 years ago
3 0

Answer:

A

Explanation:

Both mitochondria and chloroplast lack a nucleus, but instead, they are found in the cell (which is mostly eukaryotic). They are also thought to have their evolutionary origins as simple single-celled organisms.

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Which of the following is not an effect of complement activation? Select one: Interference with viral replication Increased phag
Nostrana [21]

Answer:

The correct answer is "Interference with viral replication".

Explanation:

The complement system is an essential part of the immune system that involves the activation of a series of proteins that act as a cascade and result in the development of inflammatory responses that help to fight infections. There are multiple effects of complement activation, however interference with viral replication is not one of them. The molecules that are able to interfere with viral replication are called interferons, and they synthesis and activation are not related with complement activation.

6 0
3 years ago
Beaked whales feed at various depths, but they defecate at the ocean's surface. nitrogen-rich whale feces deposited in surface w
IgorC [24]
I think if the whale population decreased the surface fish populations would decline due to reduced populations of algae. This can be simply explained by the fact that, if the whale population is decreased, it means that the nitrogen rich feces that is supply nutrients to the algae would also decrease and therefore decrease the population of the algae and as a result the population of  of the surface fish  would also decline. 
3 0
2 years ago
Why do some leaves turn yellow or orange in the fall?
Darya [45]

Answer:

C

Explanation:

The correct answer is C. because the carotenoid pigment has increased

8 0
2 years ago
Phasic receptors adapt quickly to a stimulus. For that reason, they are good at detecting changes instead of constantly signalin
Ainat [17]

Answer:

TRUE

Explanation:

Phasic receptors are sensory receptors that are fast acting in detecting changes in the strength of a particular stimulus or signal to the brain. They are  fast adapting receptor cells that detect changes in the strength of a stimulus. Because of this fast adapting ability, they cannot be used by the CNS in constant signalling of stimulus. A different receptor called Tonic receptors are used by the brain for constant signalling because they are slow reacting cells are they continue to transmit signals to the CNS along as the stimulus remains and not to changes in the pressure or strength of the stimulus. Phasic receptors are so important in predicting the changes in the body fora given time and this helps to quantify how body can react to increase or release of a stimulus. because when  stimulus is added it signals the brain for some time and it signals stops but when the stimulus is released, it also signals the brain detecting bodily deformations to various stimulus.

4 0
3 years ago
Which of the following statements best defines the term operon?An operon is a region of DNA that consists of a single gene regul
fgiga [73]

Answer:

An operon is a region of RNA that consists of the coding regions of more than one gene.

Explanation:

Operons are clusters of genes that share the same promoter and are transcribed as a single large mRNA that contains multiple structural genes or cistrons.

7 0
3 years ago
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