macronucleus 的定义
Biology.
- the larger of the two types of nuclei occurring in ciliate protozoans, having a multiple set of chromosomes and functioning in cell metabolism and protein synthesis.
更多macronucleus例句
- The macronucleus is usually dorsal, elliptical, and cleft, with one micronucleus attached.
- The macronucleus is usually double, rarely single or quadruple, but may occasionally break into numerous smaller pieces.
- The macronucleus is horseshoe-shaped or ovoid and is situated in the posterior half of the body.
- The macronucleus is spheroidal and placed near the center of the body; a conspicuous micronucleus lies near it.
- The macronucleus is globular and central, occasionally band-form and with numerous attached micronuclei.