I really need help with these biology questions:
A) The mass of some corn plants at the end of their growth period was 6 tons per acre. Most of this mass was produced from
1. water and organic compounds absorbed from the soil
2. minerals from the soil and oxygen from the air
3. minerals and organic materials absorbed from the soil
4. water from the soil and carbon dioxide from the air
B) An iodine test of a tomato plant leaf revealed that starch was present at 5:00 pm on a sunny afternoon in July. When a similar leaf from the same tomato plant was tested with iodine at 6:00 am the next morning, the test indicated that less starch was present. This reduction in starch content was likely occured because starch was
1. changed directly into proteins
2. transported out of the leaves through the guard cells
3. transported downward toward the roots through tubes
4. changed into simple sugars
C) When organisms break the bonds of organic compounds, the organisms can
1. use the smaller molecules to plug the gaps in the cell membrane to slow diffusion
2. use the energy obtained to digest molecules produced by respiration that uses oxygen
3. obtain energy or reassemble the resulting materials to form different compounds
4. excrete smaller amounts of solid waste materials during vigorous exercise
D) Worms that had been invaded by bacteria were eaten by a species of bird. Many of these birds died as a result. The most likely explanation for this is that the
1. bacteria interfered with normal life functions of the birds
2. disease that killed the birds was inherited
3. gene alterations in the bacterial cells killed the birds
4. birds produced antigens in response to the bacteria
If you know the answer to any of them that would be great! And please no rude comments about how I should "do my own homework" because my teacher assigned us a bunch of questions and these were the only ones I didn't know because we definitely haven't learned this yet, and I can't find it online.
But anyways, thanks again!
A) The mass of some corn plants at the end of their growth period was 6 tons per acre. Most of this mass was produced from
1. water and organic compounds absorbed from the soil
2. minerals from the soil and oxygen from the air
3. minerals and organic materials absorbed from the soil
4. water from the soil and carbon dioxide from the air
B) An iodine test of a tomato plant leaf revealed that starch was present at 5:00 pm on a sunny afternoon in July. When a similar leaf from the same tomato plant was tested with iodine at 6:00 am the next morning, the test indicated that less starch was present. This reduction in starch content was likely occured because starch was
1. changed directly into proteins
2. transported out of the leaves through the guard cells
3. transported downward toward the roots through tubes
4. changed into simple sugars
C) When organisms break the bonds of organic compounds, the organisms can
1. use the smaller molecules to plug the gaps in the cell membrane to slow diffusion
2. use the energy obtained to digest molecules produced by respiration that uses oxygen
3. obtain energy or reassemble the resulting materials to form different compounds
4. excrete smaller amounts of solid waste materials during vigorous exercise
D) Worms that had been invaded by bacteria were eaten by a species of bird. Many of these birds died as a result. The most likely explanation for this is that the
1. bacteria interfered with normal life functions of the birds
2. disease that killed the birds was inherited
3. gene alterations in the bacterial cells killed the birds
4. birds produced antigens in response to the bacteria
If you know the answer to any of them that would be great! And please no rude comments about how I should "do my own homework" because my teacher assigned us a bunch of questions and these were the only ones I didn't know because we definitely haven't learned this yet, and I can't find it online.
But anyways, thanks again!