Biology Proctored Exam Penn Foster Updated Questions And Answers (Verified Answers)

Discuss approaches toward a sustainable society {Ans: - Would use only renewable energy resources, reuse heat and waste materials and recycle almost everything - Would provide the same goods and services presently provided and would preserve biodiversity}What is ribosomal RNA (rRNA)? {Ans: RNA that becomes part of ribosomes (the main component of ribosomes) and catalyzes the bonding of amino acids}What is allopatric speciation? {Ans: a physical barrier divides one population into two or more populations}Explain species composition {Ans: number of species that exist within a particular community}How does bacteria reproduce? {Ans: may reproduce by 3 means of genetic recombination:: Conjugation: occurs in closely related species, DNA is passed from a donor cell to a recipient cell through tiny tubes Transformation: Fragments of DNA are picked up from surrounding living or dead bacteria transduction: Baceriophaes carry portions of bacterial DNA from one cell to another}What are seedless vascular plants? {Ans: Plants that contain vacular tissue but do not produce flowers or seeds}Explain the imporatint classifications of primates: {Ans: Prosimians- lemurs and tarsiers Anthropoids- monkeys, apes and humans Hominids- apes, chimpanzees and humans Hominins- humans}What is sexual selection? {Ans: Adaptive changes in either sex