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slavikrds [6]
3 years ago
14

Galaxies moving away from us will emit light that is redder than we would otherwise expect

Biology
1 answer:
Alekssandra [29.7K]3 years ago
3 0
This is true, for it is called redshift
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Due to hunting, the population of Northern elephant seals was reduced to 20 individuals at the end of the 19th century. Since th
anygoal [31]

Answer:

Option C

Explanation:

Long term hunting has led to following  

a) Reduction in population size and hence the gene pool

b) Causation of Bottleneck effect

Due to above factors, the remaining population of Northern elephant seals does not represent the original genetic problem.  

Due to this restriction in mating and genetic variation shall prevail pertaining to reduced gene pool.  

Due to continuous hunting, the gene pool will further shrink, leading to genetic similarity among the organism

Option C is correct

8 0
3 years ago
Which of the following statements about plankton or nekton is NOT correct?
Oduvanchick [21]

Answer:

C. All plankton are closely related to plants.

Explanation:

Plankton are organisms found in water that exist in a drifting state. They are too small or weak to swim on their own, so they let the current or tide carry them. They are usually microscopic but include larger species as well, such as some crustaceans and jellyfish.

Phytoplankton are autothrophic plankton. This means that they produce their own food. They are primary producers and closely related to plants.

Zooplankton are heterotrophic plankton, which means that they feed on other organisms. They are animals and aren't closely related to plants.

Nekton are organisms found in water that swim actively.

Based on this information, we can conclude that statement C is the only incorrect statement.

6 0
3 years ago
With a suitable diagram explain reflex action and reflex arc
iren [92.7K]

Answer:

Reflex action is the sudden uncontrolled reaction towards a certain stimuli eg response to hot iron

Reflex arc is the path taken by reflex action to a certain stimuli

Diagram depends to

Receptor(eg skin), receptor nerve(sensory neurone),centre reflex arc(spinal cord most of reflex action) they met relay neurone, motor neurone and ends at reflexor (eg muscle)

7 0
3 years ago
Recently, silver has been considered in new applications for microbial control, such as impregnating surgical dressings and infu
Rom4ik [11]

Answer: Oligodynamic and unaffected by antimicrobial resistance

Explanation:

Silver is one of the most affected effective antimicrobial which is so effective that the microbes die when being exposed to the silver.

It is used in case of wound dressing, and it is used to coat medical devices . It is used as an external application such as on the skin and while dressing.

The oligodynamic action of the metal is to block the free carbonyl and sufhydryl group present in the organism.

Even in the small concentration it can be used to kill the microbes.

5 0
3 years ago
How does cell wall help make a protein?
777dan777 [17]

Answer:

The cell wall sends signals for the cell to enter the cell cycle in order to divine and grow

Explanation:

The cell wall is porous allowing some substances, including proteins, to pass into the cell while keeping other substances out

7 0
3 years ago
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