BIOLOGY HIGH SCHOOL

Ponds, lakes, streams and rivers are all part of what kind of ecosystems?a. ocean
b. marine
c. estuaries
d. freshwater

Answers

Answer 1
Answer:

Freshwater ecosystem is part of ponds, lakes, streams and rivers. i.e, option D is correct.

What is ecosystem?

Ecosystem, the complex of living organisms, their physical environment, and all their interrelationships in a particular unit of space.

Freshwater ecosystems are a subset of Earth's aquatic ecosystems. They include lakes, ponds, rivers, streams, springs, bogs, and wetlands. They can be contrasted with marine ecosystems, which have a larger salt content.

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Answer 2
Answer: ponds, lakes, streams and rivers are all part of the freshwater ecosystem.

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A biome that contains a layer of permanently frozen soil, calledpermafrost, would be classified as A. taiga B. desert C. tundra D. savannah E. temperate deciduous forest
A particular plant species is pollinated by a certain insect species. The insect species depends on the plant species for food. Which term describes how this relationship forms?reproductive isolation co-adaptation mass extinction instantaneous speciation
A plant has been removed from its natural environment and placed into a body of water that contains a higher concentration of salt than the inside of each plant cell. The plant promptly wilts. This situation is most similar to which event?a. Seaweed put into fresh water.b. A land plant put into tap water.c. A freshwater plant put into sea water.d. A freshwater plant put into distilled water.
Which is the first medication approved to reduce the risk of human immunodeficiency virus (hiv) infection in unaffected individuals?

Which of the following is a way your body fights a bacterial infection?Fever
Shivers
Sweats
Increased heart rate

Answers

Answer:

The Correct Answer is  

"Fever"

Explanation:

These are some benefits of Fever such as:  

  • Fever fights with Infections.
  • Fever slows down bacterial and viral growth.
  • Fever increases white blood cells which chase the bacteria.
  • Fever increases the acute phase response.
  • Fever increase speed recovery time.
  • Fever protect the body from the bacterial infection.

     
Increased heart rate

In Hawaii, new land forms when lava erupts from Kīlauea volcano and hardens. The new land is without any living things. The first organisms to populate the surface of that new land are known as species. With time, a series of changes called succession occur on the new land through which it becomes colonized by a variety of organisms.

Answers

Answer:

Primary succession

Explanation:

  • The new landforms that are devoid of any vegetation have barren and rocky environment are colonized by the first plant species like grass and moss is called as primary succession which changes with time and occurs on new lands that not colonized yet and later on gets colonized a variety of organisms.

The process by which new land formed by volcanic activity in Hawaii becomes inhabited by organisms over time is called ecological succession.

In Hawaii, the formation of new land through volcanic eruptions, particularly from the Kīlauea volcano, creates a barren landscape devoid of living organisms. The initial colonization of this freshly formed land by the first living organisms is a process known as ecological succession. This process unfolds over time as a series of changes, where pioneer species, often hardy and adaptable, are the first to establish a foothold on the barren surface.

These pioneer species gradually alter the environment, making it more suitable for other, often more complex, organisms to follow. As succession progresses, a variety of plant and animal species populate the area, leading to the development of a diverse and stable ecosystem.

The entire process of ecological succession, from the colonization of pioneer species to the establishment of a mature and stable community, reflects the dynamic interactions between living organisms and their environment, showcasing the resilience and adaptability of life in the face of changing landscapes.

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A slow reproduction process is a disadvantage of which form of reproduction

Answers

Sexual reproduction in contrast with asexual reproduction which is done outside or in other words, no reproductive organs is necessary hence, fertilization is done outside like plants.

Life processes then includes.
1.   Reproduction, is as vital for an entire race to survive. It prolongs their generation onwards and offspring to the next centuries to pass by. 
2.   Obtaining energy. In both humans and animals, even plants is a challenge because these creatures need to work in order to obtain these need resource from food –preys. 
3.   Maintaining structure. For the living organisms to still exist they need to keep themselves intact. Combating diseases and having nutrition. This is a by-product of having energy.   
4. Irritability. Responding to stimulus
5. Excretion. Able to dispose waste
6. Movement. Being able to be in one place to another.
7. Growth. Able to develop.
8. Death.

24-year old woman presents with uti symptoms. she is 34 weeks pregnant. as part of her work-up, you order a urinalysis, which shows 2 bacteria with no wbcs or squamous epithelial cells. two days later, the lab calls you and informs you that the urine culture is positive. you call the patient back and she denies symptoms of urinary tract infection. with regards to the urine culture results, what treatment is indicated?

Answers

The drug prescribed to a 24-year-old woman pregnant presents with UTI symptoms is Cephalexin. This drug is safe with no risk in pregnant women.

UTI or urinary tract infection is an infection of the kidneys, bladder, urethra, or any other component of the urinary system. Women are more prone to urinary tract infections. Mostly they affect the bladder or urethra. It causes pelvic pain, urges to urinate, and blood in the urine.

Ciprofloxacin and Bactrim are quinolone antibiotics that are most commonly prescribed to treat UTIs but these drugs are harmful to pregnant women. Therefore, Cephalexin 500 mg QID for 7 days is prescribed because this is categorized by FDA as a Pregnancy Category B drug. These drugs are safe and have proven no risk in humans.  These drugs will kill the bacteria that cause UTI infections.

Therefore, option A will be a suitable treatment.

The complete question is -

A 24-year-old woman presents with URI symptoms. She is 34 weeks pregnant. As part of her work-up, you order a urinalysis, which shows 2+ bacteria with no WBCs or squamous epithelial cells. Two days later, the lab calls you and informs you that the urine culture is positive. You call the patient back and she denies symptoms of a urinary tract infection. With regards to the urine culture results, what treatment is indicated?

A) Cephalexin B) Bactrim C) no treatment D)Ciprofloxacin

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Write a note on RNA polymerase

Answers

Answer:

Ther RNA polymerases (abbreviated as RNAPs or RNA pols), represent a group of conserved enzymes that synthesize RNA from DNA templates

Explanation:

These enzymes are used to synthesize different RNA species such as, amon others, messenger RNA (mRNA), transference RNA (tRNA), noncoding RNAs (ncRNAs), etc. During the gene transcription, the RNA pol is used to produce a mRNA molecule that subsequently is translated into protein

Answer: By definition, RNA polymerase or ribonucleic acid polymerase is a multi-subnunit enzyme that catalyze the process of transcription where an RNA polymer is synthesized from a DNA template.

Explanation:

RNA polymerase are highly conserved in evolution among eukaryotes, bacteria, archea and some viruses. Bacreria and archea has a single RNA. RNA polymerase are considered as molecular motors because of their stepwise movement on DNA. They are also central to biology information flow since they catalyzed templated polymerization reaction.

Fill in the blank: When you paddle a boat in the water. the force of your paddle will push the water which will apply an equal force back on you. There is very little resistance to this motion because there is a limited _______ force between the canoe and the surface of the water due to the smooth surface​

Answers

Answer:

frictional

Explanation:

This scenario follows Newton's third law of motion which alludes to the fact that for every force or action exerted by a person on a body there is an equal and opposite reaction exerted back.

Because there is a limited frictional force (a force exerted by an object when an object moves across it) between

  • the canoe and
  • water surface (the opposite force/reaction)

Here, the paddle helps the boatman apply a force on the water, resulting in the opposite amount of force been sent back; pushing the boat forward.
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