百度试题 结果1 题目(c)Plants are not the only organisms that reproduce asexually.Name two other groups of organisms that also reproduce asexually.1 bacteria;12fungi;■■■I[2] 相关知识点: 试题来源: 解析 bacteria;fungi; 反馈 收藏
Tiny aquatic organisms calledrotifersreproduce parthenogenetically in the spring and summer. However, their eggs only produce females. In the fall, they produce tiny offspring that lack digestive tracts but produce sperm. These creatures fertilize eggs and hatch a new generation of females in the spr...
AMortimerJMortimerRobinsonMortimerJMortimerEMortimerMMortimerWatkeysMortimerGMortimerLMortimerRidgwayMortimerBMJArchives of Disease in ChildhoodRobinson AJ , Watkeys JEM, Ridgway, GL. Sexually transmitted organisms in sexually abused children. Arch Dis Child 1998; 79 :356–8. [ PMC free article ] [ ...
APolak-VogelzangBMJSexually Transmitted InfectionsTjiam KH, van Heijst BY, Polak-Vogelzang AA, Rothbarth PH, van Joost T, Stolz E. Sexually communicable micro- organisms in human semen samples to be used for artificial insemination by donor. Genitourin Med 1987; 63: 116-8....
There is a low prevalence of definitely sexually transmitted organisms in children who might have been abused. Other organisms possibly associated with sexual activity can be identified in this population. Screening for infection should be mandatory in presumed sexually abused girls with vaginal ...
What types of cells undergo meiosis? Only those thatproduce gametes, e.g. eggs in females and sperm in males. What organisms does meiosis occur in? Meiosis occurs inall sexually-reproducing single-celled and multicellular organisms(which are all eukaryotes), including animals, plants and fungi. ...
Can a woman reproduce asexually? But in many species, females do not require males to produce offspring –they can reproduce asexually. One form of asexual reproduction is parthenogenesis, where females lay unfertilised eggs that develop into clones. ...
Fertilisation In order for reproduction to be successful, fertilisation must take place. Fertilisation occurs when the nucleus of the sperm fuses with the nucleus of an egg cell to produce a zygote. A zygote is the first cell formed immediately after fertilisation. ...
as well as the ginkgo tree, ephedra bush and palm-like plants called cycads. Angiosperms, or flowering plants that produce their seeds in a protective covering called an ovary, include not only such floral beauties as the rose and lilac but also hardwood trees, grasses, cereal grains and man...
coli, for example, is about 1,000 times smaller than that of humans; bacteria are more specialized and perform fewer functions. Any letter change is more likely to do something that natural selection can ‘see’. That is, it is more likely that a small change will produce a large enough...