Why is the four stage hypothesis for the abiotic origin of life useful quizlet?
Why is the four stage hypothesis for the abiotic origin of life useful quizlet?
Why is the four-stage hypothesis for the abiotic origin of life useful? It leads to predictions that can be tested. Macroevolution differs from microevolution in that macroevolution __________.
What is the fourth stage hypothesis for the origin of life?
Stage 4 discusses how scientists believe that RNA was the first complex organic molecule found in protobionts because RNA could store information within its sequence, self-replicate, and perform several enzymatic functions as ribozymes, which are characteristics DNA and proteins do not share.
What was the first stage of the process that led to the abiotic origin of life group of answer choices?
So, the first step in the origin of life is getting the temperature right, in water, with inorganic minerals, with organic molecules, and with some source of energy.
Which of the following most strongly suggests that an impact by an asteroid may have caused the extinction of the dinosaurs?
What evidence most strongly suggests that an impact by an asteroid or meteorite may have caused the extinction of the dinosaurs? Most dinosaur fossils are fragmented, indicating that they were crushed by the asteroid. Sedimentary rocks contain a layer of iridium, a mineral uncommon on Earth.
What evidence supports the hypothesis that mitochondria and plastids evolved from?
There is broad evidence to show that mitochondria and plastids arose from bacteria and one of the strongest arguments to support the endosymbiotic theory is that both mitochondria and plastids contain DNA that is different from that of the cell nucleus and that they have their own protein biosynthesis machinery.
Which of the following is the correct ordering of divisions of the geologic record from largest to smallest?
The geologic time scale is divided into eons, eras, periods, epochs and ages with eons being the longest time divisions and ages the shortest.
What are the four processes needed for the spontaneous origin of life on Earth?
D1 Origins of Life on Earth
- The non-living synthesis of simple organic molecules (from primordial inorganic compounds)
- The assembly of these organic molecules into polymers.
- The formation of polymers that can self-replicate (enabling inheritance)
What are the four main stages that would have led to the emergence of life on Earth?
• Four Main Stages:
- abiotic synthesis of small organic molecules (monomers)
- joining of monomers into polymers.
- packaging of these molecules into protobionts, droplets with membranes that maintained a distinct internal chemistry.
- origin of self-replicating molecules that eventually made inheritance possible.
Why does the origin of life require abiotic synthesis?
Before cells evolved, however, organic molecules would’ve had to have been made via abiotic synthesis. If these building blocks of life could be made without cells, then it’s possible that they combined together to eventually form larger molecules. Amino acids could join together to form proteins.
Which genetic change helped make possible the evolution of the tetrapod limb?
A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back helped make possible the evolution of the tetrapod limb. This type of change is illustrative of __________. The original atmosphere of Earth had little oxygen.
What evidence is there to support the theory of evolution?
The film uses three complimentary lines of evidence from field studies, molecular genetics, and fossil populations to show evolution of the same trait over and over again, across hundreds of thousands of years. Genetic evidence reveals the precise molecular mechanism responsible for the change in pelvic structures in stickleback populations.
What can we learn about evolution from the fossil record?
If the same morphological changes occur in the fossil record as in living populations, we might deduce that the genetic mechanism discovered in the living populations might be responsible for the changes observed in fossils. The fossil data show a pattern of evolution over long stretches of time. Nice work! You just studied 25 terms!
