The scientist who coined the term 'cell' was: MCQ with Answer and Explanation

Explanation:
The placenta is a temporary organ formed by both fetal (chorion) and maternal (endometrium) tissues. It facilitates the exchange of oxygen, nutrients, and waste products between mother and fetus, and produces hormones (e.g., hCG, progesterone). The umbilical cord connects the fetus to the placenta. The amnion surrounds the embryo.

Explanation:
Guttation is the exudation of water droplets containing dissolved minerals from hydathodes at leaf margins, driven by root pressure when transpiration is low. Transpiration is vapor loss, bleeding is sap from cut tissue.

Explanation:
Tissue culture is a technique where plant cells, tissues, or organs are grown on a synthetic nutrient medium (like MS medium) under aseptic conditions to regenerate whole plants. It exploits totipotency. It is used for micropropagation, production of disease-free plants, and conservation. Cloning produces genetically identical individuals, genetic engineering alters DNA, hybridization crosses different varieties.