A keystone species refers to the organisms that define the entire ecosystem. These organisms are important because without them the ecosystem will work differently. They are known to be low in functional redundancy that means if these so-called keystone species disappear, there are no other species who can fill in their role. We can protect them by preserving and protecting their natural habitat, avoiding hunting activities especially the organisms that are considered to be critically endangered, planting trees, and proper waste disposal. These are some of the activities that we can do to protect them.
Answer:
According to the EPA, the average American person will produce about 5.91 pounds of trash, with about 1.51 pounds being recycled; 4.40 pounds is the rough average daily waste per person. That's a lot!
First blank "reinforcement," second blank "punishment."
Answer:
At lower temperature, membranes maintain fluidity by having a higher percentage of unsaturated fatty acids.
Explanation:
The fluidity of the membranes is affected by temperature. At lower temperature conditions, tight packing of saturated fatty acids makes the membranes more rigid. Therefore, membranes incorporate a higher proportion of unsaturated fatty acids to maintain the required fluidity. This is why the membrane lipids from the tissue near the hooves have a higher proportion of unsaturated fatty acids as the temperature of the tissues of a reindeer near extremities is lower than that of the tissues from the upper leg.
The atom has 17 protons, 20 neutrons, and 17 electrons.
