What is the first part of the scientific name of an organism, using the binomial system?
A) genus
B) group
C) kingdom
D) species
▶️ Answer/Explanation
Ans: A
In the binomial nomenclature system, the scientific name of an organism consists of two parts: the genus (first part) and the species (second part). For example, in Homo sapiens, “Homo” is the genus. The other options (group, kingdom, species) are incorrect as they do not represent the first part of the name.
Thus, the correct answer is A (Genus).
The diagram shows how Homo sapiens (modern people) could have evolved from earlier ancestors. Which statement about modern people and their ancestors is correct?
A) They are the same species and the same genus.
B) They are the same species but not the same genus.
C) They are the same genus but not the same species.
D) They are neither the same species nor the same genus.
▶️ Answer/Explanation
Ans: C
Modern humans (Homo sapiens) and their ancestors (e.g., Homo erectus, Homo habilis) belong to the same genus (Homo) but are different species. Evolution leads to speciation, meaning earlier ancestors are not the same species as modern humans.
Option A is incorrect because they are not the same species. Option B is wrong as they share the same genus. Option D is incorrect because they do belong to the same genus. Thus, the correct answer is C.