Grade 7 Biology Homework, Grade 7 Biology Exercises

The linden tree is not only rich in life, but also has a wide range of practical uses. It has a thick and majestic trunk and a slim canopy, which can be used as a street tree and for viewing; Leaf heart-shaped, the front end is slender like a tail, it is called "dripping leaf tip" in botanical, very beautiful, if it is soaked in the cold spring for a long time, wash off the mesophyll, you can get a clear and transparent, thin as a light yarn of the mesh leaf vein, called "Bodhi yarn", made into a bookmark, can prevent insects; The branches are rich in white milk, which can be used to make hard gum after being removed; Gargling with bark sap can cure toothache; Flower medicine has the effect of diaphoretic, antipyretic and analgesic; Aerial roots will grow on the branches, forming a "single tree into a forest" landscape; In some parts of India, Sri Lanka, and Myanmar, people cut down their aerial roots to feed elephants. Magnolia is a deciduous tree up to 25 meters tall and up to 200 centimeters thick, with a narrowly ovate crown when young and broadly ovate or loosely ovate when mature.

The main trunk of the tree of real origin is often obvious, majestic and majestic, the tree body is strong, the growth is strong, the nodes are long and the branches are sparse, but the amount of flowers is slightly sparse. Grafting and inoculation is often multi-stem or the main stem is low-branched characteristics, the nodes are short and the branches are dense, the tree body is small and delicate, but the flowers are clustered, the distant view is white and flawless Malabar millet is also known as melon millet, Sino-American kapok, commonly known as the fortune tree, is a tropical foliage plant of the kapok family. Its sex likes high temperature and semi-shady environment, the swelling stem can store nutrients and water, because the surface has strong stress resistance, drought resistance, shade tolerance, potted planting for families, shopping malls, hotels, offices and other indoor greening and beautification decoration, can achieve a more ideal artistic effect, can be called indoor beautification of the plant rookie.

With its beautification hall, room, rich in the southern seaside phoenix, and the meaning of "fortune" to give people good wishes white magnolia, Shanghai flowers, spring open.

The tools you choose are: tweezers, microscope, glass slide, coverslip.

The observation steps are: take a drop of water on the glass slide, cover the coverslip, observe with a microscope, first observe with a low magnification to find the field of view to be observed, and then observe with a high magnification.

Tweezers, microscope.

Place the organism on a glass slide and observe it with a microscope.

Droppers, beakers, glass slides, coverslips, staining solutions, microscopes.

Observe the big ones first, then the small ones.

Your tool of choice is a microscope to make a temporary mounting, looking with a low magnification lens first and then a high magnification.