Answer: Hydrogen bonding of water molecules
Explanation: These attractions are an example of hydrogen bonds, weak interactions that form between a hydrogen with a partial positive charge and a more electronegative atom, such as oxygen.
Answer: Low, High, Lac repressor
Explanation:
The expression of the lac structural genes is low when lactose is absent from the culture medium and is high when lactose is added, because lactose binds to the lac repressor and inactivates it.
When Lactose is present the lac genes is expressed because the substrate lactose act as inducer and binds to the lac repressor and inactivate it. So the gene is expressed.
But in the absence of lactose, the lac repressor binds the DNA and prevent the expression of the lac genes
During germination of pollen grains, the pollen grains produce a tube that grows down towards the ovary.
Germination we can term it as the process by which an organism grows from a seed or a similar structure pollen grains are reproductive structures which are also known as pollen tubes that produce male gametophytes. The first step is germination is an emergence of radicle which helps in supply of water to the growing embryo. During germination of pollen grains, it produces a tube that grows down towards the ovary. The growth of a plant which founds with a seed is called germination and it results in the formation of the grain. The companionship of male and female reproductive cells is where the seed of the vascular plant produces. Developed seeds contain an embryo and, where plant species store of food reserves, and wrapped in a seed coat. Different numbers of seeds lack nuclei which are produced by some plants, and they are called dry seeds and they never germinate. Ripe seeds that do not grow are called dormant seeds, and they are subject to external environmental conditions of metabolic processes and cell growth are prevented. Embryonic tissues resume growth, and seed begins to germinate developing towards seedling when given proper conditions.
Answer: D
Explanation: Lateral leaf growth will start on the plant.
