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How are contractile vacuoles different then types of vacuoles?
Contractile vacuoles are formed when a food particle is engulfed. Their size depends on the size of food particle. They are not predefined. Other vacoules are predefined and exist whether the food particles are present in them or not.
What size buttonhole is needed for a button with a circumference of 7.38 centimeters Use the value of 3.14 to represent pi?
for a button to fit through its buttonhole, the hole needs to be the size of the button's diameter. what size buttonhole is needed for a button with a circumference of 9.42 centimeters?
What is bioaccumulants?
Bioaccumulation is the building up of toxins in a food chain. Since toxins like, for instance, DDT, are not soluble in water and are instead stored in the fatty tissues, their levels raise each tier you go up on the food chain. I'll give you an example...Plankton, at the bottom of the food chain, eat small particulates and algae, but also take in small levels of mercury.Small fish then eat the plankton. The mercury concentrates further - remember, DDT and mercury are not water soluble toxins, so they can't be passed through urine or feces.Large fish may eay up to 1,000 small fish in their lifetime. The mercury reaches dangerous levels for humans, and may cause genetic mutations in the fish's reproductive habits (ie, size of eggs, number of eggs, etc).Oceanic birds eat large and small fish. The mercury causes more genetic defects, including thinner eggshells.As you can see, bioaccumulation poses a real danger to certain ecosystems, especially since many areas were sprayed with DDT in the 60's and 70's.
Example of density dependent factor?
predation, availability of food, disease, parasitism Things that depend on the size of the population, as opposed to density independent factors such as weather, and natural disasters.
What should be the size of a plane mirror to get a full size image of a person?
The size of the plan mirror should be half the size of the object to get a full size image of the object
When adding vector in one dimension what could the position of the head of the arrow represent?
An Arrow can be used to represent a vector by having the direction of the arrow indicate the direction of the vector and the size or length of the arrow represent the size of the vector.
When adding vectors in one dimension what could the position of the head of the arrow represent?
When adding vectors in one dimension, the position of the head of the arrow represents the final displacement or position based on the individual vector components. It shows the combined effect of the vectors acting in the same direction or opposite directions.
What does the lenght vector arrow represent?
The length of a vector arrow represents the magnitude of the vector. It indicates the size or amount of the quantity being represented by the vector.
What does the length and the arrow of a vector represent?
The length of a vector represents its magnitude or size, while the arrow of a vector indicates its direction in space. Combining both the length and arrow provides a complete description of a vector's characteristics.
What is meant by magnitude of force?
A force is a vector - in two dimensions, you can represent it on paper as an arrow. Such vector/arrows have a size, and a direction. The size is usually called the "magnitude".
Is the komodo dragon at the top of the food chain?
Komodo dragons are at the top of any food chain. They are an apex predator because of their size, strength, and poison.
Why is the insect second to the bottom on a food chain?
Because of their small size, insects cant really defend themselves that much. Therefore, making them second to last on the food chain.
What does the length of a vector of a arrow represent?
Magnitude of the force.
Where do omnivores fall on the food chain?
Omnivores are consumers that eat both plants and animals, so they fall in the middle of the food chain. They can be both predators and prey, depending on their size and habitat.
A vector is represented by an arrow What is the significance of the length of the arrow?
The length of the arrow signifies the magnitude or size of the vector.
How are the size and directions of a force represented?
A force can be represented by an arrow in which the size of the force is represented by the length of the arrow (on some artbitrary but defined scale) and the direction of the force is the diretion of the arrow.
What does the size of a vector arrow tell you?
The size of a vector arrow, also known as its magnitude, represents the magnitude of the vector's quantity or value. The longer the arrow, the larger the magnitude of the vector.
