Dab tsi yog qhov tua ntawm tsob ntoo?
Dab tsi yog qhov tua ntawm tsob ntoo?

Video: Dab tsi yog qhov tua ntawm tsob ntoo?

Video: Dab tsi yog qhov tua ntawm tsob ntoo?
Video: Xov Xwm Ceev, Mus Dai Tuag Ntawm Tsob Ntoo Tuag, Yog Tim Dab Tsis 2024, Kaum ib hlis
Anonim

Cov tua tip . Cov gametophytes ntawm mosses thiab liverworts thiab sporophytes ntawm ntau dua nroj tsuag muaj a tua , los yog ntxov qia , nrog ib lub cell ntawm nws lus qhia , los yog apex, uas tag nrho cov ntaub so ntswg ntawm lub qia sawv.

Tsis tas li ntawd, dab tsi yog qhov kev txiav txim tua?

tua tip . Lus txhais. Lub davhlau ya nyob twg bud (0.1 - 1.0 mm) ntawm ib tsob nroj, uas muaj apical meristem (0.05 - 0.1 mm) thiab tam sim ntawd ib ncig ntawm nplooj primordia thiab tsim nplooj, thiab nyob ib sab. qia ntaub so ntswg.

Ib yam li ntawd, qhov node ntawm tsob nroj yog dab tsi? Hauv kev tshawb fawb ntawm cog biology, ib cog qia muaj nodes thiab internodes. A cog qias nodes yog cov chaw tseem ceeb uas cov nplooj, ceg, thiab cov hauv paus hniav loj hlob tawm ntawm qia, thaum lub internodes yog cov ntu nruab nrab ntawm nodes.

Raws li qhov tshwm sim, qhov tua ntawm tsob ntoo yog dab tsi?

Hauv botany, tua Muaj cov stems nrog rau lawv cov appendages, nplooj thiab lateral buds, flowering stems thiab paj buds. Kev loj hlob tshiab los ntawm cov noob germination uas loj hlob tuaj yog ib tua qhov twg nplooj yuav loj hlob. Ib txhia nroj tsuag (piv txwv li bracken) tsim cov co toxins uas ua rau lawv tua inedible los yog tsawg palatable.

Qhov txawv ntawm tua thiab qia yog dab tsi?

Hauv cov ntsiab lus ntawm qhov sib txawv ntawm tua thiab qia , cov tua yog ib feem saum av ntawm cov nroj tsuag, thaum lub qia yog ib feem ntawm tua . Tua suav nrog qia , paj, nplooj, paj qia , buds, thiab lwm yam Nws kuj muab axes rau paj thiab txiv hmab txiv ntoo.

Pom zoo: