Companion cells transport of photosynthetic products from producing cells in mature leaves to the sieve elements in the minor veins of the leaf. There are at least three different types of companion cells in the minor veins of mature, exporting leaves, All three cell types have dense cytoplasm and abundant mitochondria;

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#Question id: 3753

#Unit 3. Fundamental Processes

Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?

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#Question id: 10720

#Unit 10. Ecological Principles

What is the Jaccard index between the two communities?

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#Question id: 23715

#Unit 8. Inheritance Biology

How many genotypes are possible if a character is controlled by 3 QTL?

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#Question id: 14731

#Unit 6. System Physiology – Plant

Crop Yields can be Improved by addition of fertilizers, Most chemical fertilizers contain inorganic salts of the macronutrients nitrogen, phosphorus, and potassium, Fertilizers that contain only one of these three nutrients are termed

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#Question id: 2325

#Unit 2. Cellular Organization

Which of the following is found in BOTH prokaryotic and eukaryotic cells?