The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).
Answer:
Double stranded RNA may affect gene expression negatively
Explanation:
Double stranded RNA are molecules that can affect negatively the gene expression by the fact that this kind of molecule can be complementary to others RNA molecules, or also to DNA regions on the genome. Therefore, introducing such molecules in mammalian cells can inactivate the transcription of a specific gene by the fact that those molecules could block regions of the genome that code for a gene or by connecting to some RNA molecules by similarity. Such mechanisms will reduce the production (or expression) of a given protein in these cells.
Bright field microscope
The field of vision of bright field microscope is brightly illuminated and used for most microscopic work.
Bright field microscope is the simple popular form of microscope illumination techniques. Bright field microscope is usually used with compound microscopes. The light path of a bright-field microscope is brightly illuminated and very simple. The light path is composed of a transillumination light source, an objective lens, a condenser lens, and oculars to view the sample image.
Answer:
Plant grow using a process called photosynthesis. This is a process in which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and creates oxygen as a byproduct. The plant uses the energy from the sun in order to create energy for itself while at the same time taking up carbon dioxide and water to grow.
Explanation:
Your answer would A insects because insects are the only invertebrates that can maintain flight. FOr example Butterflies and Flies Can maintain flight
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