BIOLOGY
13th Edition
ISBN: 2810017676413
Author: OpenStax
Publisher: OpenStax
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Textbook Question
Chapter 1, Problem 4RQ
The first forms of life on Earth were
- plants
- microorganisms
- birds
- dinosaurs
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The first forms of life on Earth were ________. a. plants b. microorganisms c. birds d. dinosaurs
The first forms of life on Earth were thought to be_________. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaurs
While how the first cells formed is still unknown, scientists suspect that the first active biological macromolecule wasa. protein.b. DNA.c. RNA.d. carbohydrates.
Chapter 1 Solutions
BIOLOGY
Ch. 1 - Figure 1.6 In the example below, the scientific...Ch. 1 - Figure 1.7 Decide if each of the following is an...Ch. 1 - Figure 1.16 Which of the following statements is...Ch. 1 - The first forms of life on Earth were plants...Ch. 1 - A suggested and testable explanation for an event...Ch. 1 - Which of the following sciences is not considered...Ch. 1 - The type of logical thinking that uses related...Ch. 1 - The process of helps to ensure that a scientist’s...Ch. 1 - A person notices that her houseplants that are...Ch. 1 - The smallest unit of biological structure that...
Ch. 1 - Viruses are not considered living because they...Ch. 1 - The presence of a membrane-enclosed nucleus is a...Ch. 1 - A group of individuals of the same species living...Ch. 1 - Which of the following sequences represents the...Ch. 1 - Where in a phylogenetic tree would you expect to...Ch. 1 - Although the scientific method is used by most of...Ch. 1 - Give an example of how applied science has had a...Ch. 1 - Name two topics that are likely to be studied by...Ch. 1 - Thinking about the topic of cancer, write a basic...Ch. 1 - Select two items that biologists agree are...Ch. 1 - Consider the levels of organization of the...Ch. 1 - You go for a long walk on a hot clay. Give an...Ch. 1 - Using examples, explain how biology can be studied...
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- The first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursarrow_forwardThe diagram below depicts the concept of _______. a. evolution b. reproduction c. levels of organization d. energy transfers in the living worldarrow_forwardPhotosynthesis carried out by one group of ________ resulted in Earths first increase in atmospheric oxygen levels. a. archaea c. protists b. bacteria d. algaearrow_forward
- An abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth. a. hydrogen b. methane c. oxygen d. nitrogenarrow_forwardWhich of the following organisms appeared on earth first? Prokaryotes Eukaryotes Animals Plantsarrow_forwardWhich of these steps probably occurred first in the chemical andbiological evolution of life?a. The cell membrane of a protobiont formed.b. The first organic molecules formed.c. The original genetic material was RNA.d. Simple organic monomers formed from inorganic materials.arrow_forward
- Approximately when did life first appear on land A. 500 million years ago B. 2 billion years ago C. 700 million years D. 1.5 million years agoarrow_forwardIn what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2) appearance of photosynthetic organisms, (3) appearance and increase of O2 in the atmosphere, (4) self-replicating RNA developsa. 4, 2, 3, 1b. 2, 3, 1, 4c. 3, 1, 4, 2d. 1, 2, 4, 3arrow_forwardWhich evolutionary pattern is represented by the similarities between these two organisms that live on separate continents? a.) coevolution b.) convergent evolution c.) directional evolution d.) divergent evolutionarrow_forward
- The first single-celled organisms on Earth probably evolved (a) 3,700 years ago (b) 3.7 million years ago (c) 3.7 billion years ago (d) We have no idea when the first life on Earth appeared.arrow_forwardThe native camelids of the Andes provided early humans with what? Mark all that apply. water fun protein fuel woolarrow_forwardArchaic humans appeared as early as ___________ years ago. (a) 5 million (b) 1.2 million (c) 250,000 (d) 100,000 (e) 5000arrow_forward
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