Biologists look at how organisms are related and when they first appeared on Earth. Which of the following is true about the organisms that live on Earth today?
A. All organisms that have ever lived on Earth can still be found alive today.
B. Some of the organisms alive today have been around for 4.6 billion years.
C. The organisms alive today are the same as the ones found in fossils.
D. The organisms alive today evolved from organisms that previously lived on Earth.
Answers: 1
Other questions on the subject: Biology
Biology, 22.06.2019 02:00, sanakhalid8881
The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important
Answers: 3
Biology, 22.06.2019 06:20, justinamber89
Cells are adapted to preform specific functions. which of the following terms refers to this capability?
Answers: 2
Biology, 22.06.2019 08:00, daniel8orange
Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?
Answers: 3
Biology, 22.06.2019 18:30, tyshunstephens0
Which of the following are not matched correctly? cd8+: directly destroy infected or cancerous cells t reg cell: reduce the adaptive response once threat passes t l: activate cellular branch (cytotoxic t cells, macrophages, nk cells) t 2: stimulate b cells to make antibodies t (cd4+): mhc i
Answers: 3
Do you know the correct answer?
Biologists look at how organisms are related and when they first appeared on Earth. Which of the fol...
Questions in other subjects:
