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ehidna [41]
2 years ago
12

Give an example of when a weed could be beneficial in a landscape.

Biology
1 answer:
hichkok12 [17]2 years ago
4 0
Well weed can be helpful for chronic pain and diseases helps you relax
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Which diagram best represents the cycling of respiratory and photosynthetic gases in green
Sedbober [7]

Answer:

The correct answer is - option D.

Explanation:

In algae or any other photosynthetic organism, there is the internalization of carbon dioxide gas in the reaction with water in the presence of sunlight to produce sugar molecules and oxygen gas in the atmosphere. So, photosynthesis is the process that releases or produces oxygen gas.

In cellular respiration (aerobic) the product of photosynthesis, glucose molecules, and oxygen react to produce the energy and releases carbon dioxide and water as byproducts.

So, the correct answer is - option D.

6 0
2 years ago
Which of the following observations contributed to the cell theory?
saveliy_v [14]
I'm sorry but can you be a bit more specific on these following observations?
3 0
3 years ago
Read 2 more answers
Soils contain small or trace amounts of many minerals, including the chemical elements phosphorus, calcium, potassium, magnesium
serg [7]

Answer:

Magnesium, calcium, phosphorous, sulfur these are essential nutrients for plants. These are required in trace quantity but are very important for plant life. Point A. will be correct answer.

Explanation:

As in B. starch n cellulose are composed of only carbon, oxygen and hydrogen.

As in C. These elements are not required on special occasion but are necessary throughout plant life.

As in D.  C H N O  is the primary component plants need but these secondary nutrients are equally necessary for growth n structure of plant.

<u><em>So answer A. Is the correct option.</em></u>

Calcium plays the most important role in structure formation of plants. Also act as messenger molecule in signaling. Deficiency  of calcium caused wilting , weakened stem and ultimately death of plant.

Magnesium is the key element in chlorophyll molecule. It is necessary for chlorophyll formation.

Sulfur is another very important element in plant life, it is necessary for protein synthesis in plants.

Phosphorous plays an important role in  process of cell devision , photosynthesis and respiration.

Potassium is very crucial in gaseous exchange ,it operates the opening and closing of stomata.

3 0
2 years ago
If you are driving down the road, how do you know that the car is moving (think about your reference point)?
NISA [10]
If your car is changing speed by accelerating or decelerating, or changing directions by turning or hitting a bump, your body can sense these accelerations. You might be pressed against the back of your seat while speeding up or against the car door as you turn for example. If you are cruising at a constant speed, with no changes in speed or direction, you wouldn't be able to feel it. You would need to use your other senses. You could see the scenery going by through the windows, with closer objects moving by more quickly than objects in the distance. You could also hear sounds like the wind rushing by and the hum of the tires rolling on the highway.
5 0
2 years ago
What two amounts do you need to determine speed
Nitella [24]

Answer:

i think distance and mass

Explanation:

8 0
3 years ago
Read 2 more answers
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