How has the U.S. Fish and Wildlife Service positively impacted ecosystems?

Answers

Answer 1
Answer: they have preserved areas of pollution free, ecosystems and kept them that way. eco systems are damaged by the human footprint. Also, they keep the predators and prey in balance through controlled hunting to make sure there is a balance.
Answer 2
Answer:

the answer is b on e2020 i chose d & got it wrong


Related Questions

Which of the following is NOT a nitrogen base in DNA?A. Uracil B. Thymine C. Cytosine D. Guanine
UCU-CGA-GCC-GUU-GGG-UGA how do I convert this into an amino acid using the codon chart, i've been on this forever
What happens to the carbon dioxide which collected in human tissues?
How do guard cells maintain homeostasis?
Why do erythrocytes swell and burst when placed in water? (A) Since water concentration is higher outside the cell, water moves inward by passive diffusion. (B) Since hemoglobin concentration is higher inside the cell, hemoglobin moves outward by exocytosis. (C) Since potassium ions are more concentrated inside the cells, potassium ions move outward by osmosis. (D) Erythrocytes pump water inward by active transport to balance osmotic gradients. (E) Water is a universal solvent and simply dissolves the erythrocyte membranes.

If you wanted to try and identify or classify archaea or eubacteria, you would _____A. study their habitat
B. study their genetic make-up
C. study their shape and arrangement
D. conduct Gram staining
E.study how they gain energy and nutrients
F. study how they move

Answers

c. study their shape and arrangement.

If you wanted to try and identify or classify archaea or eubacteria, you would study their habitat, study their genetic make-up, study their shape and arrangement, conduct Gram staining, study how they gain energy and nutrients and study how they move. Archaea and eubacteria are genetically different; Archaea have more complex RNA polymerases that contain multiple polypeptides while eubacteria have simple RNA polymerases that contain four polypeptides. Archaea cell walls do not contain peptidoglycan while almost all bacteria cell walls contain peptidoglycan.

Which is a disadvantage of the genetically engineered potatoes

Answers

Answer:

The question lacks options, the options are:

A) They are easier to transport and store than injectable vaccines (shots).

B) They make it easier to administer edible vaccines.

C) They are more expensive than potatoes without the vaccine.

D) They have nutritional value while potatoes without the vaccine do not.

Thw answer is C

Explanation:

Agricultural crops have faced series of problems caused by pest, nutrient composition etc. However, technology has made sure they these problems are reduced in the least possible way via the use of genetic engineering. Genetic engineering, also called genetic modification is the manipulation of an organism's genes using biotechnology procedures.

In this case, the potato crop was genetically modified, meaning that, the crop was improved genetically. Although, this process has many advantages like inserting a vaccine in the edible crop and easy storage, it also has disadvantages. One of these disadvantages as mentioned in the options is that they become more expensive than potatoes without the vaccine. The price increases due to the vaccines they now contain in comparison to the potatoes without vaccine (not genetically modified).

This price can become not affordable for an average person. Hence, it is a disadvantage of the genetically modified potato crop

Disadvantage:
1. Cause health problems for animals eating the product.
2. Some GM foods may contain allergens and toxins.
3. Gene transfer may occur between organisms.

What is required for reactants to form bonds?

Answers

Initial energy input that meets or exceeds the activation energy (the amount of energy needed for this is different for all reactions).
This is true for both endothermic and exothermic reactions, because energy must be supplied to break the bonds holding the atoms of the reactants together before they can rejoin in a different combination (to form the products)

Final answer:

For reactants to form bonds, there must be an initial energy input to drive the collision of atoms, ions, and molecules. This collision enables the breaking and formation of bonds. Both synthesis and exchange reactions demonstrate this process.

Explanation:

In order for reactants to form bonds during a chemical reaction, a few conditions must be met. Firstly, an initial investment of energy is required. This energy, often in the form of heat, provides the kinetic energy necessary to fuel the collisions of atoms, ions, and molecules. This collision must occur in an orientation that allows contact between the atoms that will become bonded together in the product. Secondly, the particles of reactant must come into contact with each other before they can react. This could be a direct collision or through another medium that facilitates the interaction.

Once the reactants collide, bonds are broken in the initial molecules, and new bonds are formed to create the product. Energy is required for breaking old bonds and is released when new ones are formed. This process can be seen in both synthesis reactions (two components bond to form a larger molecule) and exchange reactions (bonds are both formed and broken as components of the reactants are rearranged).

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How would you draw a pyramid of numbers for a dog with fleas? What shape would the pyramid take?

Answers

Since fleas usually undergo 4 steps of transformation,  i would draw 4 floors of pyramid

- The bottom floor is when the fleas still in the form of eggs
- The second floor is when the eggs transformed into larva
- The third floor is when the larva transformed into pupae
- The top of the pyramid is when the pupae already fully transformed into adult fleas

Salvinia molesta, a floating aquatic plant, first entered Lake Naivasha in Kenya when a person's fish ponds flooded. The plant quickly grew, changing the habitat of parts of the lake. This is an example of a problem due to _____.a.
reintroduction programs
c.
habitat fragmentation
b.
exotic species
d.
edge effect

Answers

The answer is b. exotic species.

Exotic species are species that are not native to specific ecosystem, but they have the capability to spread widely through the ecosystem, This way they can threaten native species of the ecosystem or cause environmental harm

Please help!!! What is a component of amino acid not contained in starchA. Amino acids contain hydrogen.

B. Amino acids contain oxygen.

C. Amino acids contain carbon.

D. Amino acids contain nitrogen.

Answers

Answer:

Starch is a polysaccharide which comes under carbohydrates.The incorrect option here is option  D which says the basic constituent of amino acid, that contains nitrogen as it is not found in starch.

Explanation:

What is the basic component of starch?

Starch is a carbohydrate. Carbohydrates are of different types like monosaccharides, disaccharides, oligosaccharides, and polysaccharides.A monosaccharide is the basic simplest form of carbohydrate and a polysaccharide is the complex one.

The basic formula of any carbohydrate contains, Carbon, hydrogen and Oxygen. The polysaccharide, as the name suggests, it has many glucose molecules linked together as a chain.

Hence, starch is a polysaccharide found in plants. It is stored in the form of a storage molecule in plants. It does not contain nitrogen as its structural component.

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Answer:

D.

Explanation:

Nitrogen is the major atom that is present in amino acids that are not present in carbohydrates.