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3 years ago

Thylakoids are membrane sacs that contain what?

Biology

2 answers:

Mariana [72]3 years ago

4 0

chlorophyll is the answer

babymother [125]3 years ago

3 0

Thylakoids contain the components needed for photosynthesis. They are the flattened sacs in the chloroplast where the membranes where the light reactions take place for photosynthesis, the process by which light energy is converted into chemical energy.

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Which plant part is the source of chilli used as spices? A) Stem. B) Root. C) Seed.

Natali [406]

Answer:

I suppose it would be the seed.

5 0

2 years ago

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* Describe at what point in the cell cycle cells begin to divide uncontrollably.

Butoxors [25]

Every cell in the body goes through a life cycle. Cells grow and divide to replace cells that are lost because of normal wear and tear or injury. Different cells grow and die at different rates. Some cells, such as epithelialepithelialA thin layer of epithelial cells that makes up the outer surfaces of the body (the skin) and lines hollow organs, glands and all passages of the respiratory, digestive, reproductive and urinary systems. cells, reproduce quickly. Other cells, like nerve cells, grow slowly. Both normal cells and cancer cells go through a sequence of steps, or phases, when they form new cells. This is called the cell cycle.

8 0

2 years ago

Mars had an orbital period of 1.88 years. In two or more complete sentences,explain how to calculate the average distance from m

Vanyuwa [196]

This is an interesting problem involving astronomy, in fact, simple physics.
Let r=distance of sun to mars, in metres

Mars had an orbital period of 1.88 years.
=>
tangential velocity, v, of the planet, in m/s is
$v=\frac{2\pi{r}}{T}$
 $=\frac{2\pi{r}}{1.88*365.25*86400}$ m/s, accounting for leap years
$=3.371*10^{-8}\pi{r}$ m/s

The centripetal force, Fc, generated is
$Fc=\frac{mv^2}{r}$
where m=mass of mars = 6.39*10^(24) kg
$=\frac{mv^2}{r}$
$=\frac{6.39*10^{24}v^2}{r}$
$=7.26168*10^9\pi^2r$

The gravitation pull from the sun, Fg, is given by
$Fg=\frac{GMm}{r^2}$
where G=grav. const., =6.67408*10^(-11) m^3 kg^(-1) s^(-2)
M=mass of sun=1.989*10^(30) kg
$=\frac{6.67408*10^{-11}1.989*10^{30}6.39*10^{24}}{r^2}$
$=\frac{8.4826*10^44}{r^2}$

Since the radial distance is in equilibrium, the average distance, r can be found by equation Fc=Fg and solving for r:
Fc=Fg
=>
$7.26168*10^9\pi^2r=\frac{8.4826*10^44}{r^2}$
Solving for the real root:
$r^3=\frac{8.48256*10^44}{7.26168*10^9*%pi^2}$
$=\frac{1.1681263*10^{35}}{\pi^2}$
=2.279*10^11 m

5 0

3 years ago

How does the dust bowl relate to human use and abuse of soil?

vitfil [10]

Answer:

Dust bowl resulted from extreme drying and loosening of the soil that resulted in soil erosion by wind. Thus, it can be related that poor agricultural practices like over plowing , over grazing and leaving the land barren are human activities that must have contributed to the dust bowl.

Explanation:

Dust bowl is referred to a period in early twentieth century when the the American and Canadian prairies faced severe dust storms.
These dust storms resulted from severe drought and failure of practices to prevent soil erosion.
Several people and livestock died as a result of choking.
Over plowing, removal of top soil and small grasses exposed the soil to eroding winds and caused the dust storms.

7 0

2 years ago

What is the purpose of control in an experiment?

Delicious77 [7]

Answer:

An experimental control is used in scientific experiments to minimize the effect of variables which are not the interest of the study. The control can be an object, population, or any other variable which a scientist would like to “control.”.

Explanation:

6 0

3 years ago