Answer:
a keystone species
Explanation:
A keystone species is a species that plays a key role in the balance of the entire ecosystem. Some examples of keynote species that are critical for their ecosystems include sharks, African elephants, sea otters, etc. The most important feature that defines a keynote species is the fact that these species have a huge influence on the food web dynamics. Moreover, keystone species are also characterized by a low functional redundancy (ie., they cannot be replaced by other species within the ecosystem).
The chance that their first child will have type O blood is 25% since the genotypes of offsprings are .
An allele is a particular form of genetic information that can be found in our DNA at a particular spot on a certain chromosome. This form of genetic information is known as an allele. IA, IB, and i are the three distinct alleles that can determine a person's blood type. I is the most common. These three alleles can be referred to as A (for IA), B (for IB), and O for the sake of simplicity (for i).
Therefore, when a man heterozygous for blood type A marries a woman heterozygous for blood type B the chances that their first child will have type O blood is 25% since the genotypes of offsprings are .
Learn more about blood groups, here:
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b. Cellular respiration occurs only in animal cells.
c. Cellular respiration occurs in both plant and animal cells.
d. Cellular respiration occurs in some plant cells and some animal cells.
The right answer is enzymes (catalase).
Catalase is an enzyme that allows the dismutation of hydrogen peroxide (hydrogen peroxide) in water and oxygen.
The oxygen-oxygen bond of the hydrogen peroxide is cut off by the iron atom of the heme group, creating a molecule of water and a highly oxidizing iron-oxygen bond. This can oxidize a new molecule of hydrogen peroxide, giving oxygen. The enzymatic reaction at play is one of the fastest known.
Within the cell, catalase helps protect the body from the oxidative and harmful action of hydrogen peroxide.