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goldfiish [28.3K]
2 years ago
14

As human populations have changed over the years, people have altered the course of rivers and other waterways to better suit th

eir needs. one approach has been through the damming of certain rivers. over time, many people question whether this effort has been beneficial. what are the negative impacts of damming a river that are being assessed?
dams allow more water to flow into nearby reservoirs, increasing the chances of disease transmission.
dams cause increases in salmon populations because more water is available for them to live in.
dams reduce salmon stocks, which reduces revenue and overall whale populations.
dams allow for invasive species to move around more easily, which reduces biodiversity.
Biology
1 answer:
a_sh-v [17]2 years ago
5 0

Dams allowing more water to flow into nearby reservoirs thereby increasing the chances of disease transmission is its negative impact.

<h3>What is a Dam?</h3>

This is a form of barrier which restricts the flow of water for different reasons such as reservoirs, electricity generation etc.

Since the water flows to reservoirs in close proximity, it increases the risk of disease transmission such as malaria etc.

Read more about Dam here brainly.com/question/11715443

#SPJ1

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A team of scientists splices a human gene into bacterial plasmids. The human gene codes for insulin. Then the scientists use the
Inessa [10]

Answer: D. The genes for antibiotic resistance help the transformed bacteria survive in their environment.

Explanation:

First and foremost, we should note that plasmids used in the delivery of DNA typically consists of genes which helps in antibiotic resistance.

Based on the question given, we should note that the genes for antibiotic resistance help the transformed bacteria survive in their environment. This is because cells that have been treated with plasmid are able to survive and grow compared to those that have not been treated with plasmid which are eventually killed by the antibiotic.

8 0
3 years ago
Define the following terms. Give an example of an organism that is described by each term. a. benthic b. pelagic c. sessile d. m
taurus [48]

Answer:

(A) Benthic- Benthic refers to the lowest or the bottom zone of the water body such as seas, and oceans. The organisms existing under such extreme pressure conditions are commonly known as benthic organisms. For example, corals and bivalves.

(B) Pelagic- Pelagic refers to the upper top portion of a water body, covering the open sea areas. The organisms existing in this region include dolphins and sharks.

(C) Sessile- Sessile refers to the property where an organism is stationary and cannot move freely from one place to another. These are known as sessile organisms such as coral polyps, Mussels.

(B) Mobile- refers to the property by which an organism can move freely in any direction it wants. For example, fishes, dolphins.

(E) Evisceration- It is a specific type of property where organisms can eject their internal organs in order to protect themselves from predators. for example, Sea cucumbers.

(F) Chitin- Chitin is a hard shell that is present in various organisms, forming its exoskeleton, for defense purposes. For example, arthropods.

6 0
3 years ago
This membrane mimics the __________________ that is around animal cells. In order to explore how water moves in and out of a cel
Olenka [21]

This membrane mimics the plasma membrane that is around animal cells. In order to explore how water moves in and out of a cell, one cell was weighed and then submerged in hypertonic solution. The other egg was weighted and submerged in hypotonic solution. It was predicted that the egg submerged in hypertonic solution  would decrease in mass. It was predicted that the egg submerged in hypotonic solution would increase in mass.

Explanation:

The outermost covering of an animal cell is the plasma membrane. It is a selectively permeable membrane that allows only selective molecules to pass through it.

A solution having higher concentration of solute than the cell cytoplasm is called a hypertonic solution.

A solution having lower concentration of solute than the cell cytoplasm is called the  hypotonic solution.

The movement of water molecules from the region of its higher concentration to the region of its lower concentration through a semipermeable membrane is called osmosis.

A cell placed in hypertonic solution will undergo exosmosis so it will lose water and its mass will decrease.

A cell placed in hypotonic solution  will undergo endosmosis of water  so it will gain water and its mass will increase.

8 0
4 years ago
Which life cycle describes a plant that reproduces asexually and sexually?
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I think it's D because I suppose that 'all its chromosomes' equals diploid
5 0
3 years ago
Read 2 more answers
Can you please answer this model?
lyudmila [28]

Answer:

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Explanation:

8 0
3 years ago
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