How might the polar bears population suddenly increase? How might this affect the ecosystem?

1 answer:

6 0

The population of polar bears could suddenly increase if their food sources or habitat increased or if people hunted them less. This could affect their ecosystem by decreasing the amount of prey available(from over hunting) or causing them to run out of territory.

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Describe an activity to demonstrate phototropism <br> Is this correct pls check now itself

Whitepunk [10]

<h3>Phototropism</h3>

Yes, the given activity is a correct example which describes phototropism

Phototropism is an adaptation or a survival mechanism undertaken by some plants to receive maximum sunlight in order to prepare more food and energy through photosynthesis.

Explanation:

Phototropism takes place through receptor proteins called phototropins which act as blue light photoreceptors.

Phototropic activity:

Phototropism can best be observed by planting few plants including phototropic plants in pots and keeping them near the window to receive sunlight.

The natural bending of phototropic plants towards the window denotes their inclination towards sunlight.

The growth of sunflower plants facing towards the sun and blooming of lotus flower under sunlight are all examples of phototropism.

Other plants which are phototropic are Phalaenopsis, azuki beans, fungus of Phycomyces species, etc.

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3 years ago

Please help, I will mark brainliest!

Andreas93 [3]

D and f as they both branch out to G, resulting in competition as to which organisms can get to G first

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3 years ago

Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists d

grigory [225]

The answer is D.<span>elliptical that is what a oval is called in other ways.</span>

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3 years ago

What is the function of DNA?

Sunny_sXe [5.5K]

Hi , the function of DNA is to give genetic instruction to organic beings.
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4 years ago

What affect does binding a gas to a hemoglobin have on homeostasis

frutty [35]

Explanation:

Haemoglobin acts as a protein buffer.

Haemoglobin- oxygen binding in the blood is part of acid-base homeostasis. The cells within the brain or CNS ensure that more oxygen is taken into the lungs at a faster rate while carbon dioxide is removed; this aids in gaseous exchange and maintaining the pH of the blood- oxygen concentrations are kept high within the blood stream as blood circulates through the body.

Blood pH levels are typically within 7.35 --7.45. it is regulated by coordinated activity controlled by the brain, and carried out by the kidneys and lungs; along with red blood cells. When the body needs more oxygen, CO2 (as waste from cellular respiration), in the blood is converted to biarbonate increasing acidity; at the same time, H released in the reaction, and buffered by haemoglobin.

-The haemoglobin undergoes reduction by oxygen, and the pH level is maintained.

Further Explanation:

A typical oxygen disassociation curve shows haemoglobin’s percentage saturation at different oxygen concentrations (partial pressures). This shows the equilibrium between oxyhaemoglobin (haemoglobin in its oxygen bound state and haemoglobin (free of oxygen molecules). The saturation generally increases with increased partial pressures of oxygen.

Haemoglobin is an oxygen binding protein comprising four iron-based peptide subunits: two α subunits and two β subunits. Each molecule of haemoglobin has the ability to bind up to four oxygen molecules at a time; this occurs via cooperative binding- meaning that with increased haemoglobin- oxygen binding at the protein haemoglobin’s subunits,(where oxygen is a ligand) there is an increase in its affinity for oxygen.

This is because there is a conformational change in the hemoglobin molecule due to the altered orientation of the protein’s secondary structures, making it easier for a second molecule of oxygen to successively followed by more O2-Haem binding until the molecule is saturated- at this point the curve plateaus- it reached its carrying limit.

Hormones bind to chemical receptors in order to cause specific changes in target cells, these lead to changes in the body's internal environment called homeostasis. It includes the thyroid, parathyroid, pituitary, pineal and adrenal glands along with other regions.