BIOLOGY HIGH SCHOOL

Manatees, aquatic mammals inhabiting Florida’s rivers and coastal waters, swim close to the surface and are frequently killed in collisions with boats. To address the problem, boat traffic in manatee-populated waters is being required to maintain very low speeds. Unfortunately, manatees are unable to hear low-pitched sounds and a boat’s sound lowers in pitch as the boat slows. Therefore, this approach may in fact make things worse rather than better.Which of the following, if true, casts most doubt on the conclusion?(A) The areas where boats would have to maintain low speeds were decided partly on the basis of manatee-population estimates and partly from numbers of reported collisions between manatees and boats.(B) Because the water hyacinth that manatees feed on grows best in water that is nearly still, water hyacinth beds can be disturbed or damaged by fast-moving boat traffic.(C) Over the last several decades, boat traffic in Florida’s coastal waters has been increasing almost continuously and now represents the greatest threat to the endangered manatee population.(D) The sound of a boat engine generally travels much further under water than it does through the air.(E) When experimenters exposed manatees to the recorded sounds of boats moving at various speeds, the creatures were unable to discern the sounds over normal-background noise.

Answers

Answer 1
Answer:

Answer: (E) When experimenters exposed manatees to the recorded sounds of boats moving at various speeds, the creatures were unable to discern the sounds over normal-background noise.

Explanation:

E is true and cast most doubt because it facilitates an experimental approach towards a given assumption. The mantees were exposed to the recorded sounds of the boats they were actually incapable of perceiving the change in sound and this clearly weakens the given argument that mantees are unable to hear the low pitched sounds when the boat get slow .


Related Questions

MIDDLE SCHOOL

consider the Wetland habitat pictured here imagine a very hot summer with very little rain what would the limiting factor for the populations of all the animals living here

Answers

Well, there wouldn't be really any water for the animals to drink.If it's very hot, and there is litte to no rain can cause bodies of water to evaporate so there will be less water to be drinken by the animials.If there in a drought there's not much they can do, just they can try consuming water when needed the most.If there is a good amount of water then they can drink whenever.If there would've been a bunch of rain they wouldn' have to worry, but in this case they have to worry because they don't have much water.

Limiting factors:

Little to no water due to drought.

Animals might die due to thirst.



The limiting factor for these animals is water. It is what they are missing because there is no rain.

MIDDLE SCHOOL

In one of her epeditions, a marine biologist finds a new organism that has an unsegmented, radially-symmetrical body with spiny skin. Under witch phylum should she classify this organism Annelids
Arthropods
Echinoderms
Mollusks

Answers

Echinoderms usually have spiny skin, Such as the Sea urchin
HIGH SCHOOL

Which term refers to a fact that naturally occurs in the universe? A)scientific law
B)scientific inquiry
C)conclusion
D)hypothesis

Answers

Answer;

A scientific law

Explanation;

-Scientific law is the term that refers to a fact that naturally occurs in the universe. It refers to a theory that has been successfully tested repeatedly and has stood the test of time.

-A hypothesis is a tentative answer to a scientific question while a theory is a hypothesis that has passed the test of many experiments and has the support of other scientist.

A.) scientific law  is the correct answer I believe 

MIDDLE SCHOOL

The board of education, in conjunction with the city, student council, parents, and administrators, have come to the conclusion that measures should be taken to ensure the safety and security of all students, teachers, and administrators on public school campuses during the school day. What is the BEST way to revise this sentence? A) The board of education, the city, the student council, parents, and administrators have concluded that measures must be taken to ensure safety on public school campuses. B) The board of education has come to the conclusion that the safety and security of public school campuses is of primary importance and should be increased or improved.

C) Measures should be taken to ensure the safety of everyone during the school day.

D) The board of education should take measures to ensure safety for everyone.

Answers

Answer:

A) The board of education, the city, the student council, parents, and administrators have concluded that measures must be taken to ensure safety on public school campuses.

Explanation:

The best way to revise sentences is to summarize the sentence so that unnecessary information is omitted, while still leaving important information a part of the sentence, all while making sure the sentence still makes sense.

The board of education, in conjunction with the city, student council, parents, and administrators, have come to the conclusion that measures should be taken to ensure the safety and security of all students, teachers, and administrators on public school campuses during the school day.

The underlined information is either not crucial to the overall statement, or can be revised in some way.

"have come to the conclusion" can be simplified to incorporate the past tense of conclusion and can be written as "have concluded".

The other underlined passages are not important to the overall statement because they provide unnecessary words to a statement that makes sense without it.

Answer:

The board of education, the city, the student council, parents, and administrators have concluded that measures must be taken to ensure safety on public school campuses.

HIGH SCHOOL

Why do plants use cotransporters instead of ion channels to transfer anions into cells?

Answers

Plants use co-transporters instead of ion channels to transfer anions into cells because co-transporters allow for the simultaneous transport of two different substances across the plasma membrane, whereas ion channels only allow for the passage of ions.

What are co-transporters?

Cotransporters are proteins that facilitate the simultaneous transport of two or more substances across the plasma membrane of a cell. They work by coupling the transport of one substance with the transport of another substance that has a different charge or concentration gradient. This allows for the efficient transfer of both substances into or out of the cell, maintaining cellular homeostasis.

In the case of anions, plants use cotransporters that also transport positively charged ions, such as sodium or potassium, into the cell. This co-transport of both anions and cations helps to balance the charge across the plasma membrane and maintain cellular homeostasis. Additionally, cotransporters can transport large amounts of anions into the cell, which is important for the uptake of nutrients such as nitrate, sulfate, and phosphate. By using cotransporters, plants are able to efficiently regulate the balance of ions and maintain optimal growth and development.

Learn more about Co-transporters, here:

brainly.com/question/28494780

#SPJ6

Answer:

When are use cotransporters used instead of ion channels to transfer anions into cells? Because cotransporters can transfer anions against the membrane potential gradient, whereas ion channels can only transfer from high concentrations to low. 1. Falvenoid released by root hairs attracts rhizobia.

Explanation:

HIGH SCHOOL

The expression of sex linked genes is controlled by hormones

Answers

False - sex linked genes are controlled by chromosomes.
HIGH SCHOOL

When may a plain band ring be worn when preparing food? a. always
b. never
c. if gloves are worn over ring
d. if it is approved by the person in charge?

Answers

Answering the question, a plain band ring may be worn when preparing food if gloves are worn over the ring. The correct answer is C.

When you practice good personal hygiene, it will protect your food by preventing physical and biological hazards from contaminating your food.

Further Explanation

Apart from the fact that you can put on a plain band ring with gloves worn over it when preparing your food, there are other food hygiene practices that should be followed to ensure food safety.

You must wear a clean uniform. If your uniform is not clean, it will attract pathogens and this can contaminate your food. It is also necessary to bathe before you resume work.

  1. Always wash your hand: ensure your hands are always clean because the hands contain numerous pathogens and viruses that can spread over your food. You should wash your hand anytime you touch your face before you start a new task and after using the restroom.
  2. Always wear gloves: however, you must wash your hand thoroughly before you wear hand gloves. Avoid touching some areas on your body such as your face, hair, after wearing hand gloves
  3. Be careful of jewelry: some pathogens can hide in jewelry, therefore in order not to contaminate your food, avoid wearing any jewelry.

Other measures that must be taken to avoid food contamination include

  • Don’t smoke, eat or drink
  • Ensure you put on a hear covering
  • Make sure your fingers are clean and properly trimmed.

LEARN MORE:

  • When may a wedding ring be worn when preparing food?  brainly.com/question/6298845
  • When may a plain band ring be worn when preparing food?  brainly.com/question/10206238

KEYWORDS:

  • gloves
  • ring
  • worn
  • contamination
  • food

Plain band ring can always be worn while preparing food (a).

Further Explanation:

Food handlers are advised to wear plain band ring always during work. This is because bracelets, rings, watches having stones may fall into the food and this made create a physical hazard. Pathogens are harmful microorganisms that have the tendency of causing diseases in humans. These get trapped under the jewelry and creates a biological hazard. Hence, jewelry is not advised to be worn when working with food.  

Wedding rings can be worn in case they are wrapped with a glove when the food worker is making food. Hygiene is utmost important in food industry and therefore, it is widely important for the food handlers to be cautious when handling food. These gloves must be changed after every four hours as that’s enough for the pathogens to multiply to dangerous levels.

Learn More:

  1. Learn more about meiosis brainly.com/question/1600165
  2. Learn more about the process of molecular diffusion in a cell brainly.com/question/1600165
  3. Learn more about human sperm and egg cell brainly.com/question/1626319

Answer Details:

Grade: Middle School

Subject: Biology

Chapter: Preservation of food

Keywords:

Gloves, protection, food handlers, hygiene, food industry, microorganisms, wedding rings, jewelry, watches, pathogens.

MIDDLE SCHOOL

Which tiny, round “factory” puts together protein and is often found in the endoplasmic reticulum? A. chromosome B. chloroplast C. Golgi body D. ribosome

Answers

D. Ribosome

Proteins are manufactured on ribosomes, which are found in the rough ER. The rough ER is called this for the rough appearance the ribosomes give it.
D. ribosome hope this helps
COLLEGE

"using the designated letters list the stages of meiosis in sequence"

Answers

1.      Prophase I

-          The chromosomes shorten, and the nuclear envelope breaks down where crossing-over happens.

2.      Metaphase I

-          Pairs of homologous chromosomes interchange to the equator of the cell.

3.      Anaphase I

-          Homologous chromosomes move to the opposite poles of the cell.

4.      Telophase I and Cytokinesis

-          Chromosomes meet at the poles of the cells and the cytoplasm splits.

5.      Prophase II

-          A different spindle forms around the chromosomes.

6.      Metaphase II

-          Chromosomes stroke at the equator.

7.      Anaphase II

-          Centromeres will divide and chromatids will gather to the opposite poles of the cells.

8.      Telophase II and Cytokinesis

-          A nuclear envelope will form around each set of chromosomes and the cytoplasm distributes.

 

 

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