May 16, 2017 · Question 11 Multiple Choice Part A Which organisms contain the smallest , least complex cell types ? ANSWER : ... 5/2/2017 Unit 3 Chapter 8 4/13 Correct Chapter 8 Question 14 Multiple Choice Part A Which organisms are called extremophiles and flourish mostly in extreme conditions? ... Course Hero, Inc.
The least complex microbe is: a. Plants and animals b. Insects and algae c. Protozoa and fungi d. Viruses and bacteria d . Viruses and bacteria The virus is less complex than the bacteria, which is less complex than the fungi, insects, algae, plants, animals, etc. 25.
Which organisms contain the smallest, least complex cell types? a) b) a) Plant cells c) d) b) Animal cells e) f) c) Bacteria cells g) h) d) Fungal cells Question 5 1.
ANSWER: Flagella Capsule Biofilm Correct Chapter 8 Question 8 Multiple Choice Part A If you looked at unknown cells under a microscope, what could lead you to correctly conclude that they are prokaryotic cells? ANSWER: bacillus coccus spirillum spheroid Endospore Flagella Capsule Biofil…
The correct answer is (c) Bacteria cells. Whereas plants, animals, and fungi are all eukaryotic organisms, bacteria are prokaryotic.
Prokaryotic cells are generally smaller and simpler than eukaryotic cells; in addition to the absence of a nucleus, their genomes are less complex and they do not contain cytoplasmic organelles or a cytoskeleton (Table 1.1).
The main hypothesis about the origin of the first living organisms is called ________. biogenesis. What does the term biogenesis mean? Formation of life from nonliving materials. Many of the organic molecules associated with life can be created spontaneously under certain conditions.
What are the steps toward multicellularity, in the correct order? First a colony of protists forms, then some become gametes, and finally others specialize in various tasks. Some cells become gametes, then a colony forms, and finally some cells start to specialize.
Bacteria mycoplasma has the smallest cell. Its size is around 0.1 micrometers.Nov 26, 2021
prokaryotic cellsAt 0.1–5.0 µm in diameter, prokaryotic cells are significantly smaller than eukaryotic cells, which have diameters ranging from 10–100 µm (Figure 3.7). The small size of prokaryotes allows ions and organic molecules that enter them to quickly spread to other parts of the cell.
The most widely accepted hypothesis of Earth's origins is the nebula hypothesis. The nebula hypothesis in detail. Several sets of hypotheses propose how life began on Earth.
What do the nucleus and mitochondria have in common? They both contain DNA.
In 1953, Stanley Miller and Harold Urey did an experiment to test Oparin and Haldane's ideas. They found that organic molecules could be spontaneously produced under reducing conditions thought to resemble those of early Earth.
prokaryotes are classified into two domains, with the organisms in domain Archaea more similar to eukaryotes than to the prokaryotes in the domain Bacteria.
Many prokaryotic organisms such as bacteria reproduce by the process of binary fission. Binary fission is the primary method of reproduction of prokaryotic organisms. In protists, binary fission is often differentiated into types, such as transverse or longitudinal, depending on the axis of cell separation.
What do the following groups of organisms have in common: methanogens (methane-producing organisms), halophiles (salt-loving organisms), and thermophiles (heat-loving organisms)? They are all archaea.
Prokaryotic Cells. The simplest type of cells were most likely the first type of cells that formed on Earth. These are called prokaryotic cells. All prokaryotic cells have a cell membrane surrounding the cell, cytoplasm where all of the metabolic processes happen, ribosomes that make proteins, and a circular DNA molecule called a nucleoid where ...
The currently accepted theory of cell evolution is called the Endosymbiotic Theory. It asserts that some of the organelles, namely the mitochondria and chloroplast, were originally smaller prokaryotic cells engulfed by larger prokaryotic cells.
Most reproduce through a process called binary fission where basically the cell just splits in half after copying its DNA. This means that without mutations within the DNA, offspring are identical to their parent. All organisms in the taxonomic domains Archaea and Bacteria are prokaryotic organisms.
The other, much more complex, type of cell is called the eukaryotic cell. Like prokaryotic cells, eukaryotic cells have cell membranes, cytoplasm, ribosomes, and DNA. However, there are many more organelles within eukaryotic cells. These include a nucleus to house the DNA , a nucleolus where ribosomes are made, rough endoplasmic reticulum for protein assembly, smooth endoplasmic reticulum for making lipids, Golgi apparatus for sorting and exporting proteins, mitochondria for creating energy, a cytoskeleton for structure and transporting information, and vesicles to move proteins around the cell. Some eukaryotic cells also have lysosomes or peroxisomes to digest waste, vacuoles for storing water or other things, chloroplasts for photosynthesis, and centrioles for splitting the cell during mitosis. Cell walls can also be found surrounding some types of eukaryotic cells.
Updated May 04, 2019. The earth was formed about 4.6 billion years ago. For a very long period of the earth's history, there was a very hostile and volcanic environment. It is difficult to imagine any life being viable in those types of conditions.
All organisms in the taxonomic domains Archaea and Bacteria are prokaryotic organisms. In fact, many of the species within the Archaea domain are found within hydrothermal vents. It is possible they were the first living organisms on Earth when life was first forming.
These theories include the formation of organic molecules within what is known as the "Primordial Soup", life coming to Earth on asteroids (Panspermia Theory), or the first primitive cells forming in hydrothermal vents .