What is the transmissive barrier through which two cell layers interact in the structure of the Coral Body

When one organism consumes another organism, energy is transferred to the consumer.

dsp73

Answer:

C. flower → butterfly → bird → snake

Explanation:

It is the only option possible out of all of them, which stands true when compared with the food web shown.

3 0

4 years ago

Signals that are from molecules that are not normally found in the body are called _________ signals, unlike endogenous signals

anzhelika [568]

Answer:

The answer is exogenous/non-self signals.

Explanation:

All types of stimuli that trigger certain responses from cells are broadly classified into two categories:

Self/ Endogenous Ligands

A ligand is a carrier molecule that can binds to a stimulus, thus, producing a signaling molecule. Ligands bind to specific receptors in or the surface of the cell.

Self/endogenous signals are signaling molecules produced by the body itself. They are part of normal cellular communication.

2. Non-self/Exogenous Ligands:

These are signals produced by a foreign source such as a pathogen or a drug administered into the body. Basically, any signal that is foreign to the body and not produced by the body itself are exogenous ligands. Exogenous ligands elicit an immune or allergic response in the body. When identified, these ligands and their source is attacked by the immune system.

3 0

4 years ago

What function do skin cells perform?

ahrayia [7]

They tell your skin when it needs help with something.

7 0

3 years ago

A bacterial cell that contains an outer membrane and periplasmic space stains pink to red on Gram stain. Which one of the follow

anastassius [24]

Answer:

a. No discrepancy is present; organisms that contain an outer membrane and periplasmic space should stain pink because of their cell wall composition.

Explanation:

Gram stain is the staining method used to differentiate bacterial species into two groups, gram-positive and gram-negative bacteria. Factors that will differentiate gram-positive from gram-negative include the coloration of bacteria, the composition and chemical and physical properties of cell walls. In these tests, bacteria that have an outer membrane and a periplasmic space are considered gram negative and pink in color (sometimes similar to red) due to their cellular composition. For this reason we can state that there is no discrepancy present in the bacteria exposed in the question; Because this bacterium has an outer membrane and a periplasmic space, then it is normal for the bacteria to turn pink due to its cell wall composition.

6 0

3 years ago

Rosa drew a diagram to compare substitution mutation and insertion mutations. What label belongs in the area marked "Y"?

Bezzdna [24]

Answer:

Hey There!

_____________________________________

Answer:

_____________________________________

Mutations:

Mutations are the changes produced in the nucleotide sequence of the genome.

There are four main types of mutations

Substitution

Insertion

Deletion

Duplication.

_____________________________________

DELETION:

A small segment of chromosome mat be missing. This condition is known as deletion.

For example, Normal chromosome has A B C D E F G. If deletion mutation occurs then mutated chromosome has A D E F G and B C got deleted.

_____________________________________

DUPLICATION:

In this condition, a part of chromosome present in exec ess to the normal chromosome.

For example, Normal Chromosome has A B C D E F G. If duplication mutation occurs, then mutated chromosome had A B C B C D E F G and B C is duplicated.

_____________________________________

SUBSTITUTION MUTATION:

Substitution is a type of mutation where one base pair is replaced by a different base pair.

For example, in the sequence CAAGT, if C replaces G, it is a substitution mutation.

INSERTION MUTATION:

In genetics, an insertion is the addition of one or more nucleotide base pairs into a DNA sequence.

For example, in the sequence CAAGT, if extra base G gets inserted after C, the new sequence would be CGAAGT.

_____________________________________

Both substitution and insertion mutations change the position of nucleotide thus, the type of amino acid. Option A is correct because B and D are wrong as increase in number of bases and decrease in number of bases is because of deletion and duplication mutations here it asks for substitution and insertion mutations. C is wrong as In mutation there is always a change in bases or chromosome. So all the other choices seem incorrect as it is asking for substitution and insertion the base pair changes which results in the change in type of amino acid.

_____________________________________

Best Regards,

8 0

3 years ago