A pesticide that kills an insect by interfering with the production of proteins in the insect would most directly affect the activity of
(1) ribosomes
(2) minerals
(3) chloroplasts
(4) mitochondria
When two different bird species temporarily occupy the same niche, they would most likely
(1) change their nesting behaviors
(2) not affect one another
(3) interbreed to form a new species (4) compete with one another
Which group would most likely be represented in a food chain?
(1) biotic factors
(2) abiotic factors
(3) inorganic compounds
(4) finite resources
Which statement describes a similarity between all enzymes, antibodies, and hormones?
(1) Their chemical structure is critical to their ability to function.
(2) Their ability to replicate identical copies ensures continuation of the species.
(3) They work better at 100°C than 37°C.
(4) They are made by and carried by the blood
Thank you SO much.
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I Really Need Help On These 4 Questions , Help?
Posted on December 28, 2012.
1. ribosomes
2. compete
3. biotic factors
4. chemical structure is critical
1. Mitochondria would be my first answer as most insecticides act on them: http://www.ncbi.nlm.nih.gov/pubmed/19278…
Ribosomes would technically be correct too(http://www.ncbi.nlm.nih.gov/pubmed/10732… but mitochondria would be a more obvious pathway when you consider the importance of mitochondria to energy production.
2. Competition would occur. However, the question says they temporarily are in the same niche. This is implying that something would change, such as changing nesting behavior. The most correct answer would be competition since the question doesn’t provide evidence for nest changing behavior.
3. Biotic factors. Biotic factors are basically any living component that effects another organism. That’s what food chains are describing.
4. Chemical structure. All three are proteins, and proteins act by binding to receptors. This is a lock and key mechanism where the chemical structure needs to correct. If there is a slight difference, they will not be able to bind to their receptor.