Question

What is chloroplast ? what is xylem ? what is phloem ?

Answer 1

chloroplast;-the chloroplast are the green plastids  .these are the most important of the  plastids  and are scattered in the cytoplasm .they contain chlorophyll and are found in parts exposed of light and occur in great number in green leaves. they manufactured food material in the presence of sunlight by the help of co2 and water . chloroplast  contain their own DNA and RNA...XYLEM;-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;-
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 via phloem. 

Answer 2

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Chloroplasts are organelles that conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells.