Which of these phrases apply to prokaryotes?

originated ~3.8 billion years ago
originated ~1.6 billion years ago
have plasmids
have circular chromosomes
have chloroplasts
have mitochondria
have DNA inside a nucleus

Question

Which of these phrases apply to prokaryotes?

originated ~3.8 billion years ago
originated ~1.6 billion years ago
have plasmids
have circular chromosomes
have chloroplasts
have mitochondria
have DNA inside a nucleus

BlackTom AI · Accepted Answer

To evaluate this question, let's examine each statement about prokaryotes and determine whether it is true or false.
Option 1: 'originated ~3.8 billion years ago' — This is true. Current understanding places the emergence of prokaryotes very early in life on Earth, around 3.8 billion years ago, making them among the earliest life forms.
Option 2: 'originated ~1.6 billion years ago' — This is false. 1.6 billion years ago is far later than the origin of prokaryotes and would not align with the widely accepted timeline for their appearance.
Option 3: 'have plasmids' — This is true. Many prokaryotes carry plasmids, which are small circular DNA molecules independent of the main chromosome and can carry advantageous genes.
Option 4: 'have circular chromosomes' — This is true. Prokaryotic genomes are typically a single circular chromosome, although some have additional small circular elements (plasmids).
Option 5: 'have chloroplasts' — This is false. Chloroplasts are organelles found in plant and algal cells (eukaryotes) and are not present in prokaryotes.
Option 6: 'have mitochondria' — This is false. Mitochondria are organelles of eukaryotic cells; prokaryotes lack membrane-bound organelles like mitochondria.
Option 7: 'have DNA inside a nucleus' — This is false. Prokaryotes lack a defined nucleus; their DNA resides in the cytoplasm in a nucleoid region.
Overall, the true statements are options 1, 3, and 4, while options 2, 5, 6, and 7 are incorrect due to established differences between prokaryotic and eukaryotic cell organization and evolutionary history.

Which of these phrases apply to prokaryotes? originated ~3.8 billion years ago originated ~1.6 billion years ago have plasmids have circular chromosomes have chloroplasts have mitochondria have DNA inside a nucleus单项选择题

类似问题

Which of the following is NOT a characteristic of prokaryotic cells?

Question at position 17 All prokaryotes containmitochondria and DNA.chloroplasts and vacuoles.DNA and a cell wall.a nucleus and DNA.Clear my selection

Which of the following is NOT a characteristic of prokaryotic cells?

Bacteria are:

What are the main characteristics of prokaryotic microorganisms?

Which of the following IS CHARACTERISTIC of prokaryotic organisms?

Which of the following is NOT a characteristic of prokaryotic cells?

Which of the following BEST describes a bacterium?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单