Cardiac output is the amount of blood pumped by the heart in one minute.
Which of these will increase cardiac output?
A.
decreased blood volume
increased physical activity
c.
decreased metabolic activity
increased resistance in blood vessels
B.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.