Question

1 Which hormones known as time messenger? Why?
2 Write the characteristic of insect pollinated flowers
3 What shale gas?
4 Three resistors of resistances 5ohm 3ohm and 2 ohm are
connected in series with 10V battery Calculate the effective resistance
and the current flowing through the out​

Answer 1

Answer:

1) Hormones are chemical messengers secreted into blood or extracellular fluid by one cell that affect the functioning of other cells. Most hormones circulate in blood, coming into contact with essentially all cells. ... A target cell responds to a hormone because it bears receptors for the hormone.

2) Expert Answer:

Characteristics of Insect pollinated flowers:

Large and coloured petals to attract insects.

Nectar to attract insects.

Pollen grains are sticky so that they can stick easily to insect's body parts.

Characteristics of water pollinated flowers:

Stamens and pollen grains are spongy and water-proof.

3) Shale gas refers to natural gas that is trapped within shale formations. Shales are fine-grained sedimentary rocks that can be rich sources of petroleum and natural gas.