Transport is the movement of materials to-and-fro from the cells.
In unicellular organisms, which are single celled, the cell can directly absorb the food, water and air from the surrounding. Plants and animals are multi-cellular organisms. They are made of large collection of cells. These cells need water, minerals and nutrients for their growth and survival. The cells are not in direct contact with their surroundings, thus cannot directly exchange the nutrients with the surrounding. The multi-cellular organisms however have a special network of tubes and vessels that make the supply of nutrients to the cells within the body possible.
PH- extremes denature/ change enzyme shape, so they rate decreases
temp –extreme heat denature/ change enzyme shape, so they rate decreases substrate concentration- as substrate levels decrease, enzyme activity decreases
Answer:
Organs are grouped into organ systems, in which they work together to carry out a particular function for the organism. For example, the heart and the blood vessels make up the cardiovascular system. ... On the right, a diagram of the circulatory system showing heart and blood vessels.
Explanation:
Answer:
1 - Deforestation
2 - Industrial Fishing (mass fishing; when industries use those big nets to collect a ton of fish. y’know that Finding Nemo scene?
3 - Global Warming
4 - Poaching
5 - Pollution
Explanation:
Deforestation is destructive to our air quality, as well as the homes of wild life. This can and does causes animals to die, and not enough animals for the greater part of the food chain.
Industrial fishing is harmful to entire environments purely by there being a lack of fish for other animals to eat, as well as a large portion of the worlds fish being now absent because of this mass fishing.
Global Warming is caused by harmful gasses being released into our atmosphere, which is harmful for all life on earth when the earth’s temperatures are being raised.
Climate change in general is bad and caused by humans’ negative impact.
Poaching is illegally hunting animals. This leads to [if not already endangered] wild animals being endangered or extinct.
Pollution can go from anything to littering on the street or beach to industries dumping oil into our oceans, which is harmful for our water supply and all ocean wildlife.
<span>The answer to this question would be: keep blood moving forward through the heart
When the ventricle contracts, the valve will plug the hole to atrium so the blood will be pump to the body. The valve in heart will prevent backflow of blood from ventricle to atrium which makes the blood keep moving forward.
A defect in valve could reduce heart deficiency as a part of the blood might be going back to the atrium, called regurgitation.</span>