Answer:
(i) An allele is a variant of a gene, can either be short or tall.
Dominant = the tall allele that "trumps" the short allele. if a dominant and recessive allele is present (heterozygous) then the dominant phenotype will be shown.
(ii) David's eyes are Brown
(iii) Sarah's eyes are blue
(iv) David - B, b
Sarah - b, b
(v) Possible genotypes include Bb and bb. These give the phenotypes of brown eyes or blue eyes.
(vi) The chance for blue eyes is 50% (or 1:1 ratio)
Answer: E. When one contracts, the other relaxes and this allows the bones to move; triceps and biceps.
Explanation:
Antagonistic action occurs between the two pairs of muscles. In this action one muscle while contracts other muscle relaxes. The example of antagonistic pair is of biceps and triceps. The triceps remain in the relax phase while the biceps contracts so as to lift the arm.
The pumping of the heart is tied to the respiratory system
Answer:
Locked up in rocks
.
Explanation:
The volcano consists of the high melted lava that are present in the rupture of the earth's crust. The disturbances and movement in the tectonic plates might cause volcano eruption.
The volcanic eruption releases large amount of carbon dioxide, ash and harmful chemicals. The carbon dioxide that are erupted is locked in the rocks that are present on the earth's surface. The carbon dioxide is stored in the form of carbonates in the rock.
Thus, the answer is locked up in rocks
.
Unlike other renewable energy sources, biomass can be converted directly into liquid fuels, called "biofuels," to help meet transportation fuel needs. The two most common types of biofuels in use today are ethanol and biodiesel, both of which represent the first generation of biofuel technology.
