let the students narrate their own reconnaissance of a decisive variety of moth life

Section
insect reproduction and development of teaching objectives:
1, say for instance during insect reproductive development and characteristics.
2, at visiting the development of silkworm, an overview of the process of metamorphosis.
3, the state insect and person making and life, and care about the development of biotechnology.
teaching preparation:
quest students before level layout traces of insects (such as cicada, dead cicadas, caterpillars, butterflies, grasshoppers, mantis, etc.), systematize students to observe the development of silkworm samples, conditional to organize visits for students the process of silkworm propagating.
teaching process: to adviser students to know their common insects collected (body divided into three portions, three couples of legs , there are 2 pairs of wings)
guide students to decide the taxonomic status of an insect (invertebrate mm mm Arthropoda Insecta)
an insect's reproductive
let the students say they have penetrated the insects reproductive phenomena (such as eggs, touched, etc.). for students on the basis of the existing position of insects in a sexual course oviparous. and thus contrast different sexual and asexual reproduction.
Second,if only the birth parents remedy a baby would no be so ah ~ ~ so cruel, insect development
1, let the students tell their own detection of a definite kind of insect life, by family, students tin make sericulture a small pedagogue students. Comparison of caterpillars and butterflies are the same point (a expression after the panel discussion. )
said the student, teacher to be reckoned. and export the concept of metamorphosis.
2, 43,46 textbooks for students to inspect the two-page color pictures, have a alter understanding of the process of metamorphosis, respectively, after which the process . by the students ahead the students about the cicada cicada is the outcome of three stages of development,toronto asian escort, insect molting cicada explain the phenomenon. molting is an essential function of insect development. Finally come to a altogether metamorphosis and incomplete metamorphosis of the concept. < br> 3, focus ashore explaining the incomplete metamorphosis grasshopper during the development of the life experience
locust egg, nymphs and adult stages. to annotate the characteristics of nymphs (genital not development, not adult wing, phoned the bound hoppers, After molting via 5 amplify into adults. This leads to the concept of age: from zygote to old because a premier molt, afterward 5 to 6 larvae behind molting)
P39 Question 15 train quizzes can do then , play a role in time to consolidate.
three adult biological control of locusts have
bunch, migration characteristics, damage grasses, easy to form a plague of locusts (locust multimedia video projection)
grant students to consult locust abuse, and took the chance to inspire usages of locust control (1, afforestation, for locust eggs favor the mire on a dry bare .2, a kind of soybeans, fruit trees and other trees,toronto escorts, reducing food sources of locusts .3, protection of the frog, the Protection of Birds 4, spray locust control of microorganisms and other specialized)
Earth is the common homeland of always organisms, only to biological-based, to maintain ecological balance, defend the global context.
Blackboard Design:
insect reproduction: sexual forgery (oviparous)

incomplete metamorphosis complete metamorphosis
insect development: metamorphosis {