Cellulose, lignin, hemi-cellulose and fibres are all molecules in the structure of the plant cell wall that makes the plant (in this case a blade of grass) stand up straight.
Polysaccharide
The portion of a leaf that wraps around the stem at the base of the blade on a grass plant is called the sheath. It helps to provide structural support to the leaf and connects it to the stem.
No, grass is not a molecule. Grass is a complex organism made up of various molecules such as proteins, carbohydrates, and chlorophyll. Molecules are combinations of atoms bonded together, while grass is a living plant composed of many different types of molecules working together.
No, sticking a blade of grass up your nose will not cause you to faint. However, it can irritate the nasal passages and potentially cause discomfort or a nosebleed. It's best to avoid inserting foreign objects into your nose.
To give a basic and broad perspective answer this is an example of common organism feeding patterns. ex: the water's cellular life base and the sun's rays help the, per say, blade of grass be nurtured, that same blade of grass either is eaten by an insect, a herbivore, or dies and withers to help nurture fungi in the forest. The insect who ate that blade of grass is perhaps later eaten by a frog. The frog, who ate the insect that had eaten the grass, is perhaps eaten by a bird of prey. The bird is possibly hunted and becomes our next meal or is killed off and eaten by a cougar. From there the cycle continues on to larger, voracious animals till it finally goes back to that single blade of grass.
Various botany books on how to key out or identify grasses are available at any bookstore or nature store you come across. It's also completely fine to use the Internet via your favourite search engine such as Google to see what grass could possibly be growing in your lawn. Basically, though, the best way to ID the type of grass in your lawn is to not use the grass that has been repeatedly cut with the mower, but grass that has never been or can't be cut with the mower or even clipper due to accessibility issues. Start by looking at the tip of the blade of the grass--hopefully a blade that hasn't been cut, because if it's been cut that won't help you at all--the shape of the blade in terms of width, length, and how much of a V is formed with the blade. Then look at the part where the blade connects to the stem, and look at the collar, the auricles, and the ligule and see if they exist, the shape, and size of them. Roll the stem in your fingers to feel how round it is. Some grasses are never completely round in the stem. Finally, if you can, find a grass that has an "inflorescence" or a seed head (or the flowering part of the grass) and note the size, shape, and structure of the inflorescence. Then use all that information, and probably more which hasn't been mentioned here, to identify the grass growing in your lawn. The same method to ID the grass in your lawn is also used to ID grasses grown in pastures and native grasslands. The difference between your lawn and the latter two areas is that your lawn is basically a monoculture of one particular species of grass, whereas the latter two are a polyculture of several grass species, from two to at least 10 within a few hundred square feet. Please see the related link[s] below for tips on identifying grasses.
Turgor pressure is what allows a blade of grass to stand up straight. This is a type of a molecule.
Chlorophyll is the molecule in a blade of grass that captures solar energy during photosynthesis.
polysaccharide
The dew drop can fall of the tree and land carefully on the grass
polysaccharide
This question is unanswerable as it depends on which type of grass you mean.
a blade of grass weigh a gram? Not normal grass anyway, weigh much less
This is somewhat more complicated than you might think. There are several sugar polymers, most specifically cellulose, that contribute structural rigidity to plant structures. However in many grasses microscopic crystals of silicon dioxide (i.e. quartz) are embedded in these polymers like steel rebar is embedded in concrete to give extra strength and rigidity to the blades of grass. Such grasses can be identified because the edges of the grass blades have an abrasive "saw blade" like feeling when touched.
blade+grass blade+wheat
It is unlikely that a blade of grass can kill you in a tornado. Tornadoes are dangerous due to their strong winds and debris, but a single blade of grass would not pose a significant threat to your safety during a tornado.
A blade of grass?
Do you mean a Blade of grass.