Answer:
The correct answer is - Test cross.
Explanation:
A test cross is a cross that is made between an organism with an unknown dominant genotype and an organism that purebred recessive genotype for the particular trait. It determines if the unknown genotype of the individual being tested is purebred allele dominant or heterozygous for the trait.
If all offspring in F1 generation has phenotypically dominant trait then the tested organism is pure breed dominant and if half of the offsprings have the phenotypically dominant trait and half show recessive trait then the organism to be tested is heterozygous or hybrid.
Answer:
The correct answer is option A. "The contents of blood come into closer contact with tissues in a closed system than an open system".
Explanation:
In a closed circulatory system, the blood has an specific path, circulating from arteries to veins and to smaller blood vessels throughout the body. This is in contrast with open circulatory systems at which the blood is not contained in arteries or veins but it suffuses the body. A closed circulatory system have many advantages over open circulatory system, however in a closed circulatory system the contents of blood are not into closer contact with tissues in than an open system. Actually, in an open circulatory system the blood is in closer contact with tissues.
<span>The answer is B. It depends on developmental family and produces trees called cladograms. Cladistics likewise recognizes clades, which are gatherings of life forms that incorporate a progenitor species and its relatives. Ordering life forms on the premise of drop from a typical precursor is called phylogenetic characterization.</span>
The answer is D. these are all chemical reactions.
4 and 5 are correct,
Hormones are Endocrine
Fingernails are Integumentary
Sperm is Reproductive
Bladder is Excretory
Killing Pathogens is Immune
