Unit 5+6 Flashcards
When a tree is alive it has energy stored in its living parts (leaves, roots, etc.). When the tree dies all the parts are still there, but no longer alive. How much of the energy is still in the dead tree?
All of the energy
As a plant grows, where does most of the matter in the plant come from?
Carbon in the air
As an endotherm (warm-blooded) species, your body produces its own heat. Where does the heat mainly come from?
The heat mainly comes from chemical energy in the foods you eat, released through cellular respiration.
When a mouse is alive it has energy stored in its living parts (muscles, fat, blood, etc.). When the mouse dies all the parts are still there, but no longer alive. How much of the energy is still in the dead mouse?
All of the energy
Which of the following is (are) the energy source(s) for plants?
Sunlight
Why does the same volume of coal hold more energy than the same volume of wood?
Because the coal has more chemical bonds than the wood
After sunlight strikes a plant and becomes involved in photosynthesis, what will happen to the suns energy?
The energy will change into another form of energy and be stored in the plant.
A sealed greenhouse (a glass building where plants are grown) contains many plants. After 1 week, all of the plants have grown a little larger. After 1 week, how will the mass of the air in the greenhouse change?
It will decrease, because the plants in the greenhouse are adding carbon from the air to their tissues
Photosynthesis evolved before there was a substantial concentration of Oxygen (O2) in Earth’s atmosphere. [True/False]
True
The action of what organism was required in order for the evolution of organisms with Oxygen-dependent respiratory metabolism to take place?
cyanobacteria
The first major increase of oxygen in Earth’s atmosphere was caused by photosynthetic bacteria. [True/False]
True
Bacteria were the first organisms to perform photosynthesis but were not the first organisms to perform nitrogen fixation. [True/False]
False
Which of the following processes first evolved in bacteria?
photosynthesis
nitrogen fixation
respiration
all of the above
Photosynthesis in bacteria can involve the production of formaldehyde. [True/False]
True
Which of the following is true?
A. Nitrogen fixation first evolved in bacteria.
B. Nitrogen fixation converts nitrogen from the air into forms that can be used by eukaryotes.
C. Nitrogen fixation occurs in environments that lack oxygen.
D. Nitrogen is essential for biological molecules including DNA.
all of the above
Which of the following statements is true?
A. Oxygen was present on Earth soon after the planet formed.
B. The great oxygenation event is associated with the origin of photosynthesis.
C. The production of carbon rich sugars was associated with the origin of photosynthesis.
none of the above
The evolution of vascular tissue is associated with large increases in size of many land plant groups compared to ancestral plants. [True/False]
True
The invasion of land by plants was associated with a massive increase in oxygen production. [True/False]
True
In both mosses and ferns, vascular tissue is present. [True/False]
False
All green plants are land plants. [True/False]
False
What is considered a “byproduct” of photosynthesis?
oxygen
What is the food for decomposers?
dead tissue
matter with organic molecules
matter with carbon-carbon bonds
Fill in the blanks: Photoautotrophs get their energy from _____ and matter from _______
the sun; inorganic molecules
What is different between burning coal and burning wood?
Burning wood puts carbon into the atmosphere that was in the atmosphere not very long ago but burning coal puts carbon into the atmosphere that has not been in the atmosphere for an extremely long time
