Answer:
Leaves
Explanation:
Plants grow broad leaves to absorb sunlight. This is extremely helpful because this helps plants make food through photosynthesis. Roots don't absorb sunlight. They absorb water and nutrients from the soil and carry it up through the stems. The stems then transports the nutrients throughout the plant.
Answer:
Membrane Transport by ion channels.
Explanation:
Stromal interaction molecules STIM1 and STIM2 are membrane proteins localized in the Endoplasmic Reticulum (ER). It has been shown that these proteins play important cellular functions. For example, STIM1 and STIM2 ion channels are involved in the activation of cell surface receptors, being it a specific signaling pathway associated with the store‐operated calcium entry. Calcium ions (Ca2+) in the cytoplasm are released from the ER by STIM1 and STIM2, and this protein activity is required for initiating different cellular processes including apoptosis, migration and cell proliferation.
