1.) the oldest fossil identifie so far , the stromatolites , represent which typ
ID: 142201 • Letter: 1
Question
1.) the oldest fossil identifie so far , the stromatolites , represent which type of cell ? A. Virus B. Prokaryotes C. Multicellular D. Eukaryotes 2. A genetic change that causes 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 a tetrapods limb. This type of change represents which of the following ? A. Paedomorphosis B. Heterochrony C. A change in developmental gene or in its regulation that altered the spatial organization of body parts D. The influence of environment on development 3. The endosymbiosis theory states the orgin of the eukaryotic cells began when A. A mutation in prokaryotic cells led to the creation of new organelles B. Prokaryotic cell consumed a smaller cell C. Prokaryotic cells went extinct D. A prokaryotic cell needed more energy and evolved a mitochondria 4. Long term trends over geological history in speciation and extinction rates can be partially explained by A. Natural selection in small populations B. Over harvesting by humans C. Plate tectonics and continental drift D. Short term changes in present day environment 5. Fossil records are important for understanding change in living organism however there are multiple limitations including ( choose all that apply ) 1. Evolutionary trends in fossils may change when new fossils are found 2. Some organisms do not create fossils 3. Fossil records are biased towards certain types of species 4. Not all fossils have been found1.) the oldest fossil identifie so far , the stromatolites , represent which type of cell ? A. Virus B. Prokaryotes C. Multicellular D. Eukaryotes 2. A genetic change that causes 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 a tetrapods limb. This type of change represents which of the following ? A. Paedomorphosis B. Heterochrony C. A change in developmental gene or in its regulation that altered the spatial organization of body parts D. The influence of environment on development 3. The endosymbiosis theory states the orgin of the eukaryotic cells began when A. A mutation in prokaryotic cells led to the creation of new organelles B. Prokaryotic cell consumed a smaller cell C. Prokaryotic cells went extinct D. A prokaryotic cell needed more energy and evolved a mitochondria 4. Long term trends over geological history in speciation and extinction rates can be partially explained by A. Natural selection in small populations B. Over harvesting by humans C. Plate tectonics and continental drift D. Short term changes in present day environment 5. Fossil records are important for understanding change in living organism however there are multiple limitations including ( choose all that apply ) 1. Evolutionary trends in fossils may change when new fossils are found 2. Some organisms do not create fossils 3. Fossil records are biased towards certain types of species 4. Not all fossils have been found
A. Virus B. Prokaryotes C. Multicellular D. Eukaryotes 2. A genetic change that causes 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 a tetrapods limb. This type of change represents which of the following ? A. Paedomorphosis B. Heterochrony C. A change in developmental gene or in its regulation that altered the spatial organization of body parts D. The influence of environment on development 3. The endosymbiosis theory states the orgin of the eukaryotic cells began when A. A mutation in prokaryotic cells led to the creation of new organelles B. Prokaryotic cell consumed a smaller cell C. Prokaryotic cells went extinct D. A prokaryotic cell needed more energy and evolved a mitochondria 4. Long term trends over geological history in speciation and extinction rates can be partially explained by A. Natural selection in small populations B. Over harvesting by humans C. Plate tectonics and continental drift D. Short term changes in present day environment 5. Fossil records are important for understanding change in living organism however there are multiple limitations including ( choose all that apply ) 1. Evolutionary trends in fossils may change when new fossils are found 2. Some organisms do not create fossils 3. Fossil records are biased towards certain types of species 4. Not all fossils have been found
Explanation / Answer
1. Stromatolites, are rock-like structures which are a type of sedimentary rocks that are formed by the deposit of rocks over Cyanobacteria which is a type of photosynthetic prokaryote. Hence the answer to this question is option B. Prokaryotes.
2. Hox Genes are important in the development of limbs in vertebrates. A genetic change that causes a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back is an example of a mutation or a genetic change that alters the position of a body part. Hence, the correct option to this question is Option C.
3. According to endosymbiosis theory. Eukaryotic organisms developed from the early prokaryotic organisms by consuming another prokaryotic organism entirely intact. That is how mitochondria and chloroplast came into existence. Hence, the correct option for this is Option B.
4. Speciation and extinction rates of organisms depend on many factors, of which one the important ones is the spatial distribution of the species. Tectonic movement of land mass and continental drift causes a small group of a particular species to separate from the mainland, which in turn leads to speciation. Some of the species which cannot withstand this and survive due to lack of food or mate, may become extinct during the process. Hence, the correct answer to this question is Option C.
5. Fossil records are important for understanding change in living organism, but they have limitations of their own: a) all fossils are not yet found, b) fossils are created by organisms with hard endoskeleton or exoskeleton. Organisms with soft body rarely creates a fossil. Hence, the correct options are, 2 and 4.
Kindly rate if this was helpful.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.