Explain why the cane toad was a failure as a biological control method in Australia.

1 answer:

7 0

The cane toad was a failure as a biological control method in Australia because:
-The greyback beetle it was supposed to be eating fed at the top of the sugarcane stalks (which were 6-8 meters in height). Cane toads cannot fly or climb and therefore couldnt feed on the beetles.
-The beetles were out during the daytime, and cane toads feed at night.
-The two species are not seasonally compatible (aren't in the same place at the same time of year).
-The toads needed moist conditions to survive, and so moved away from where they were supposed to be.
-The cane toad eats many native species and often out-competes native species for food and breeding sites, leading to the decline of natives.
-Breeding habits made the cane toads a very invasive species.

You might be interested in

why do polysaccharides like cellulose and peptidoglycan able to resist degradation and enzymatic activity

mixer [17]

Polysaccharides like Cellulose form insoluble micro-fibrils making it resistant to degradation and enzymatic activity.

EXPLANATION:

Polysaccharides components in general broken down monosaccharides and they are very little enough to be absorbed by the body.
But the polysaccharide like cellulose cannot be absorbed by our body.
Cellulose is made up of simple polymers that form insoluble micro-fibrils results in resistant to degradation and enzymatic activity.
Also, molecules of each micro-fibril are so tightly packed structure and prevent the penetration of enzymes.
Thus, cellulose degradation requires a complex enzyme and cellulose.

7 0

3 years ago

Which white blood cell type is not correctly matched with its proper function or feature?.

Bezzdna [24]

Answer:

basophils:

Explanation:

primary phagocytic cells type that fights infection

5 0

2 years ago

What is the difference between a fumarole and a geyser?

REY [17]

Answer: They are both openings within the Earth but, Fumaroles release gases (carbon dioxide, sulfur dioxide, hydrogen chloride, and hydrogen sulfide) and steam, and Geysers release water and steam.

Explanation:

8 0

2 years ago

Refer to the Biochemistry in Focus section of your text for this chapter to answer this question. Sarin inhibits acetylcholinest

DENIUS [597]

Answer:

c. Pyridostigmine binds to the acetylcholinesterase active site and prevents sarin from binding to and modifying the enzyme active site.

Explanation:

Sarin is a toxic compound which inhibits acetylcholinesterase enzyme. This enzyme degrades the neurotransmitter acetylcholine after the required muscle cell stimulation. In absence of its activity, acetylcholine is not degraded and the muscle cells are stimulated uncontrollably. The muscles are not able to relax which ultimately proves fatal for the victim.

Pyridostigmine is also an acetylcholinesterase inhibitor like Sarin. However its period of inhibition is short compared to organophosphorus inhibitors like sarin. It competes with sarin and replaces it in the active site of acetylcholinesterase. The enzyme is still inhibited but for a shorter time as compared to inhibition by Sarin. Hence after sometime, it becomes functional again and resumes its normal activity. Acetycholine starts getting degraded relaxing the muscles.

8 0

2 years ago

Explain why complementary base pairing is necessary to maintain the double helix shape of the dna molecule.

vodomira [7]

This is known as double helix. Nucleotides each have three parts: phosphate, sugar molecule, and one of four bases. The bases include: A, (adenine), g (guanine), t (thymine), c (cytosine). ... Explain why complementary base pairing is necessary to maintain the double helix shape of the DNA molecule.

3 0

3 years ago