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irinina [24]
3 years ago
13

A particular plant species can reproduce both sexually and asexually. When samples of this plant are grown in an environment whe

re a harmful bacterial pathogen is abundant, the plants that survive are likely to have been produced primarily through what type of reproduction? See Section 13.4 (Page 285) .
Biology
1 answer:
Yakvenalex [24]3 years ago
5 0

Answer:

Sexual reproduction

Explanation:

In asexual reproduction, the same genes are transferred to the next generation because there is no combination of genes takes place so the rate of variation is very less in asexual reproduction and in sexual reproduction combination of different genes from two different parents occurs which give rise to genetic variation.

So when the plant is put in an environment where harmful bacteria are present then it will prefer sexual reproduction to bring variation in its genome so that it can get the ability to fight against these pathogenic bacteria.  

The plants that reproduced asexually will be eradicated by pathogens because they can not get the new genes to fight against the pathogen due to lack of appropriate variation in their gene.

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A newborn baby dies soon after birth because her diaphragm and rib cage muscles failed to contract and she was unable to breathe
kozerog [31]

Answer:

Troponin

Explanation:

This is a complex of three proteins  (Trop C, I, T) that are responsible for muscle contraction of  the skeletal and cardiac  muscles . its binds with protein tropomysin  to lie in the grove between the actin filaments.  its prevents contraction by blocking  myosin crossbridge  in a relax muscles.Inorder to aid contractions  calcium ions binds with troponin, which leads to confrontational change.This exposes myosin on actin filaments,  leading to formation of crossbridge and therefore contraction of muscles.

Therefore if there is  a mutation in the gene that encoded Troponin, as explained above, calcium ion  will not be able to bind with tropinin, and there will be no exposure of myosin on actin filaments, no binding of  myosin on actin to cause crossbridge, and consequently no  muscle contraction,

Thus the intercoastal  muscle and diaphragm will not contract leading to death of the baby.

8 0
3 years ago
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Nylon is a material made by humans. A nylon factory released wastewater containing small pieces of nylon into a pond. Some
Dennis_Churaev [7]

Answer: C. The mutation resulted in a beneficial trait that enhanced survival.

Explanation:

The bacteria was able to "evolve" and adapt to the Nylon being in its environment.

7 0
3 years ago
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An important difference between a series and a parallel circuit is that a series circuit cannot have any breaks. A parallel circ
Yanka [14]

Answer:

Yes.

Explanation:

Parallel circuit are those types of circuits in which break in one branch does not prevent the flow of current in the circuit and the current can still flow through another branch because there are more ways through which the current moves to other sources while on the other hand, series circuit refers to those circuits in which break in one branch can prevent the current flow in the circuit and the other sources can't receive current due to broken of the connection.

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3 years ago
What is the sequence the organs that are involved in each step of digestion
Cloud [144]

Answer:

The gastrointestinal tract comprises of Mouth-Esophagus-Stomach-Small intestine-Colon-Rectum.

Liver, pancreas and gallbladder are solid organs of digestive system.

Explanation:

Digestion is the process involved in the conversion of large complex food molecules into smaller nutrients that can be used by body cells for survival and carry out their function. The digestive system comprises of various subsequent organs that digest the food.

  • Digestion starts in mouth where salivary glands digest the carbohydrates.
  • The food moves from mouth to stomach through alimentary canal known as esophagus. It includes peristalsis movements.
  • The stomach mixes the food with digestive juices and move the chyme to small intestine.
  • The small intestine mixes the food with juices secreted from pancreas, liver and intestine and pass it to large intestine.
  • The large intestine digest the water content from indigested food and pass the reamining to rectum.
  • The rectum store the undigested food and excrete it through anus.

5 0
3 years ago
After recording the damage encountered in a load, what should be done with the damaged cases?
kupik [55]
The thing you need to do with the damage cases is mark them as damaged and report it immediately to a supervisor, after recording the damage encountered in a load. Tell and report the damage cases immediately or as soon as possible to a higher rank in the company or to the supervisor when you are done marking it as damaged.
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