Collecting a gas given off from a plant in bright sunlight at a temperature of 27 degrees C. The gas most likely is ___.
oxygen
100
The beginning of photosynthesis is ___.
Pigments in the first photosystem absorb light.
100
The cell carries out metabolic processes during ___.
During interphase.
100
What is a malignant tumor?
A mass of cancer cells
100
What is the biosphere?
Land, water and air on Earth and all their organisms.
200
The products of the light reactions are
oxygen, ATP and NADPH
200
Why does the inside of the thylakoid membrane become positively charged during the light reactions?
H plus ions are released as water splits
200
Interphase consists fo G1, S, and G2 phases. True or false.
True
200
Cancer is a disease in which some cells lose their ability to control their ___.
Rate of division.
200
A mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. This behavior is probably due to ___.
the change in an abiotic factor in its environment.
300
Steps in the light reactions are ___, ___, and ___.
Electrons move through the electron transport chain, pigments in the first photosystem absorb light and ATP synthase all H plus ions to pass through the thylakoid membrane.
300
Where are the photosystems found?
in the thylakoid membrane
300
During which phase of mitosis do the chromosomes line up along the middle of the dividing cells?
metaphase
300
Which of the following is a phase of mitosis? cytokeinsis, prophase, S phase, or interphase.
prophase
300
The unequal heating of the Earth's surface ___, ___, and ___.
affects Earth's climate regions, causes winds, and drives ocean currents.
400
A granum is ___.
A stack of thylakoids.
400
What is the product of the Calvin cycle?
sugar
400
One difference between cytokinesis in plant cells and in animal cells is that plant cells have ___.
a cell plate.
400
The two main stages of the mitotic phase are called ___ and ___.
cytokinesis and mitosis
400
A mountain can affect climate by ___.
causing precipation to fall mostly on one side of the mountain.
500
The pathway that represents the flow of electrons during photosynthesis is ___.
H2O yields NADPH yields Calvin cycle
500
What are the parts of a chromosome during mitosis? See drawing) What phase of mitosis are these structures visible?
Centromere, and sister chromatids. Prophase and metaphase
500
When is DNA replicated during the cell cycle?
During the S phase (DNA synthesis)
500
The cell cycle is ___.
a series of events that cells go through from "birth" to reproduction.
500
A biome is identified by its
characteristic community of organisms, particularly plants.