Early Life on Earth
This is approximately when life began on Earth
What is 3.5-4.6 billion years ago?
When using a microscope, you should always carry it with this many hands
What is two?
This is the smallest unit that can carry out life functions
What is a cell?
The scientific study of plants is known by this term
What is botany?
These two tubes in plants carry water, nutrients, and food throughout the plant
What are xylem and phloem?
Scientists believe life may have started in this "soup" containing organic compounds
What is primordial soup?
This type of focus should be used first to find the specimen while looking through the eyepiece
What is coarse focus?
These specialized structures inside cells perform specific jobs, similar to "little organs."
What are organelles?
Plants that make their own food are known by this term
What are autotrophs?
The female reproductive parts of a flower are collectively known as this
What is the pistil?
These underwater features providing energy and chemicals may have been where life first developed.
What are hydrothermal vents?
This part of the microscope controls the amount of light passing through the specimen
What is the diaphragm?
This type of cell has no nucleus and no membrane-bound organelles
What is a prokaryotic cell?
This green pigment found in plant cells is the key to photosynthesis
What is chlorophyll?
This process converts light energy into chemical energy in the form of sugar
What is photosynthesis?
This event around 2.4 billion years ago dramatically changed Earth's atmosphere
What is the Great Oxygenation Event?
This part of the microscope holds multiple objective lenses and can be rotated to change magnification
What is the revolving nosepiece?
This organelle is often called the "powerhouse of the cell" because it produces energy
What is the mitochondria?
Plants with a system of tubes that transport nutrients are classified as this
What are vascular plants?
This type of plant growth response is specifically a reaction to light
What is phototropism?
Around 375 million years ago, these vertebrates evolved limbs that could support weight on land
What are fish (becoming the first amphibians)?
When viewing through a microscope, moving the slide in this direction makes the image appear to move in the opposite direction
What is any direction?
This structure is present in plant cells but absent in animal cells, giving plants their rigid structure.
What is the cell wall?
This type of plant reproduction involves growing new plants from plant parts rather than from seeds
What is propagation?
These cells found in leaves are in charge of opening and closing the stomata to control gas exchange and water loss
What are guard cells?