. About how long ago did Archimedes live?
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Certain viruses have a cloaking cover made of a protein-lipid combination with glycoprotein projections from the surface. These viruses, such as mumps, use their glycoprotein spikes to simulate a normal protein and thereby mask their identity so they can attach to receptor sites on the cell membrane of the host.
Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Bacteria are an example of prokaryotes.Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.
Characteristics of Eubacteria - Real Bacteria.Bacteria are all known as prokaryotes. Prokaryotes are organisms that lack a cell nucleus and other cellparts, and tend to be less complex. Eubacteria/bacteria also possess cell walls made of peptidoglycan, a chemical that gives their cell wall added strength
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Plant cells, and some protists have chloroplasts, though animal and fungal cells lack them. Prokaryotes do not have chloroplasts (or any other organelles), though some can carry out photosynthesis, its cell acting like one bigchloroplast. In most cases, chloroplasts are green
General Characteristics of Fungi:
Eukaryotic.
Decomposers – the best recyclers around.
No chlorophyll – non photosynthetic.
Most multicellular (hyphae) – some unicellular (yeast)
Non-motile.
Cell walls made of chitin (kite-in) instead of cellulose like that of a plant.
Are more related to animals than plant kingdom.
Plants have chlorophyll, a green pigment necessary for photosynthesis;
Their cell walls are made sturdy by a material called cellulose; and.
They are fixed in one place (they don't move).
Xylem is the vascular tissue responsible for the transport of water and nutrients from the roots in the soil to the above-ground parts of the plant. Hormones and other small molecules also travel through the xylem as they are moved throughout the plant.
Phloem is the vascular tissue responsible for the transport of sugars from source tissues (ex. photosynthetic leaf cells) to sink tissues (ex. non-photosynthetic root cells or developing flowers). Other molecules such as proteins and mRNAs are also transported throughout the plant viaphloem.
The main difference between vascular and nonvascular plants is that avascular plant has vascular vessels to carry water and food to all the different parts of the plant. The phloem is the vessel that transports food and the xylem is the vessel that transports water.
The shoot system generally grows above ground, where it absorbs the light needed for photosynthesis. ... The organ systems of a typical plant are illustrated below. The shoot system of a plant consists ofleaves, stems, flowers, and fruits. The root systemanchors the plant while absorbing water and minerals from the soil
