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3 years ago

Why was the rearing of marine species in tank aquaculture so difficult before yonathan zohar figured out how to do it?

Biology

1 answer:

blsea [12.9K]3 years ago

5 0

I believe this problem has the following choices:

a. It was hard to get the fish to breed and produce offspring for the aquaculturist to raise.

b. Because the fish were stressed in tanks, they required much more food, reducing the profitability of rearing the fish this way.

c. The fish had to be raised in a community with several species of fish in the same tank, and they would attack and eat each other.

d. Marine fish are more aggressive than their freshwater relatives and they tended to fight a lot, often killing some of the other fish in the tank.

The correct answer is:

c. The fish had to be raised in a community with several species of fish in the same tank, and they would attack and eat each other.

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Sulfur emissions from industry combine with water in the atmosphere and form acid rain. A new factory is built very close to the

Setler79 [48]

Sulfur emissions from industry combine with water in the atmosphere and form acid rain. A new factory is built very close to the lake that Josh visits often. By examining the table that shows what pH range different species can survive, Josh decides that the aquatic life will be affected by the changes in pH that the lake. Josh correctly decides that organisms that will be the most affected are

A) perch and frogs.

B) mayfly and bass.

C) snails and clams.

D) frogs and salamanders.

The correct answer is option (C) snails and clams.

Acid rain is formed when oxides of sulfur and nitrogen combine with water molecules. Industries are one of the major contributors to acid rain. pH is a measure of acidity or alkalinity in water.

A factory built close to the lake can cause acid rain which affects the pH of the lake. Any change in the pH of the lake has an effect on the organisms in it. A pH of 7 is considered to be neutral and pH values below 7 indicates acidity and pH values above 7 indicates alkalinity. Organisms have an acid tolerance level beyond which they are affected and can die. Perch has an acid tolerance of up to pH 4.5 and frogs can tolerate an acidic pH of 4.0. The acid tolerance level of Mayfly and Bass is a pH of 5.5. Salamanders can tolerate an acidic pH of 5. Whereas, Snails and Clams have a very less pH tolerance of 6. They are highly susceptible to acidic pH.

Thus, Josh correctly decides that organisms that will be the most affected are snails and clams.

6 0

3 years ago

Read 2 more answers

Why do you think it is important for climate scientists to study El Niño?

Mumz [18]

Answer:

answer below

Explanation:

this seemingly isolated event is just one part of the global climate system and can actually have major influences on the weather and climate around the world

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3 years ago

What is the difference between circulatory system and types of circulation

Nady [450]

Answer:

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.

There are two main types of circulatory systems: 1. open circulatory systems and closed circulatory systems. Open circulatory systems are systems where internal organs and body tissues are surrounded by circulatory fluid. This fluid is called hemolymph, and it's pretty much like blood, except that it doesn't contain oxygen transporting cells.

2. The closed circulatory system of some mollusks and all vertebrates and higher invertebrates is a much more efficient system. Here blood is pumped through a closed system of arteries, veins, and capillaries. Capillaries surround the organs, making sure that all cells have an equal opportunity for nourishment and removal of their waste products. However, even closed circulatory systems differ as we move further up the evolutionary tree.

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3 years ago

What three letter codon will produce Tryptophan?

Taya2010 [7]

Answer:

UGG

Explanation:

Look at a codon chart then look for Tryptophan then look for the 3 letter codon that corresponds

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2 years ago

A bat species (species 1) lives in a city. Another bat species (species 2) established a population in that same city after some

ddd [48]

Answer:

Roosting areas in buildings of any height are the resource partitioning of both bat species.

Explanation:

The fundamental niche refers only to physic conditions in which a species can live and survive in the absence of any interaction with other species.

The realized niche refers to the restricted conditions in which a species can live and survive as a result of environment physic characteristics and the interaction with other species.

Competitive exclusion refers to the exclusion of the inferior competitor by the superior competitor when there is not habitat differentiation, and both species can not share the same niche. In this case, the effective niche of the dominant species completely occupies the fundamental niche of the inferior competitor.

Resources partitioning refers to one dominant species monopolizing the resources, and the other inferior species use resources -partially or completely-, migrates or get extinguished.

A way in which species can divide resources is by living in different habitat areas. These species might eat the same food, and can roost in different places within the same habitat. This resource partitioning and differentiation in the function of their physic location allows both species to coexist more effectively.

In the present example, both bat species can coexist in the same city but the weaker bat species (species 1) roost at the top of the shorter buildings while dominant species (species 2) roost at the top of the highest buildings.

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2 years ago