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horsena [70]
3 years ago
6

please help i do not understand and I'm struggling with these biology questions please help me will give 10 points) How are a se

ed coat a pollen grain and a spore wall adaptive structures?​
Biology
1 answer:
STALIN [3.7K]3 years ago
7 0

seed coat protects the cotyledons and embryo from outer environment and from attack of pathogens

pollen grain has a sculptors covering with weak points(germ pores) in it through which pollen tube comes out.

A spore is generally protected by 2-3 tough resistant walls around to tied over the unfavourable conditions.

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many prople try to eliminate fat from their diets. which is one reasom it is necessary for humans to eat fat​
Ira Lisetskai [31]

Explanation:

Fats are very important classes of food needed by the body. Excess fat is not good for the body.

The following are the reasons fats are essential for the body;

  • They provide energy for the body too.
  • Fats are good insulators helping to keep the body warm.
  • They help the body absorb vitamins because some vitamins are only soluble in fats.
  • They help in growing of the cell.

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Food brainly.com/question/8790597

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6 0
3 years ago
The ovaries are small organs that produce egg cells in females. Removal of
nlexa [21]

Answer:

B

Explanation:

if you were a female and had this done to you, you would then understand.

3 0
3 years ago
What role do bacteria play in the nitrogen cycle?
tino4ka555 [31]

Answer:

it helps with Stage 2

Explanation:

in the nitrogen cycle you need bacteria to help it change into different forms of matter

5 0
3 years ago
A velocity-time graph shows how<br> I<br> changes over<br> time.
stich3 [128]

Answer:

What does a linear velocity graph tell us?

The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. If the acceleration is zero, then the slope is zero (i.e., a horizontal line). If the acceleration is positive, then the slope is positive (i.e., an upward sloping line).

What is an acceleration time graph?

A graph that shows acceleration plotted against time for a particle moving in a straight line. ... The acceleration-time graph is the graph y=a(t), where the t-axis is horizontal and the y-axis is vertical with the positive direction upwards.

graph shows changes in velocity of a moving object over time. The slope of a velocity-time graph represents acceleration of the moving object.

Explanation:

Download docx
6 0
2 years ago
Match each term to its best definition *apex*
liraira [26]

Answer:

apex refers to the highest point or vertex of a plant stem or root. The shoot apex is where fresh stems, leaves, and other parts of a plant grow after the old parts fall off or dry up.

Explanation:In experiments conducted plants with the apex grows and its height increase while the height of the plant without the apex does not change.In another experiment plant with the apex grows towards the direction of sunlight which is positive phototropic movement and the plant without the apex does not turn towards light.therefore we can conclude there is an effect of the apex on the growth of a plant.

5 0
3 years ago
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