protozoon

1 When balance is disturbed—by anything from indigestion in a protozoon up to a storm on the ocean where he lives, there is a catastrophe.

2 The other protozoon was Vorticella monilata, Tatem, which has been found, not in association with Hydra, in Europe and S. America.

3 You open another book idly, and you see: Organic life, we are told, has developed gradually from the protozoon to the philosopher, and this development, we are assured, is indubitably an advance.

4 This protozoon secretes a shell about itself which has a characteristic shape, and often carries spines.

5 Instead of comparing with a mammal at the top of the organic scale, it is like a formless, undifferentiated protozoon at the bottom.

6 And in all cases—in the humblest alga as in the oak, in the protozoon as in the mammal—this fertilized germ results from the union of the contents of two cells.

7 On the first occasion the tentacles were completely covered with this protozoon, so that they appeared at first sight as though encased in flagellated epithelium.

8 Unfortunately it is the philosopher, not the protozoon, who gives us this assurance.

9 Organic life, we are told, has developed gradually from the protozoon to the philosopher, and this development, we are assured, is indubitably an advance.

10 For we may look at this matter in another light, and say our exuberant protozoon has shed a daughter, and remains.

11 To it energy is available which is denied to the protozoon.

12 On the surface of the sponge I have found a peculiar protozoon which resembles the European Trichodina spongill� in general structure but belongs, I think, to a distinct species, if not to a distinct genus.

13 Let us begin our comparative study with an example of the simplest animals that consist of only a single cell, such as the little protozoon Amoeba.

14 Unfortunately it is the philosopher, not the protozoon, who gives us this assurance, and we can have no security that the impartial outsider would agree with the philosopher's self-complacent assumption.

15 For it is to this phenomenon—that of cell division—that the continued life of the protozoon is to be ascribed, as we have already seen.

16 Now, if so, how long would it take to obtain an elephant from a protozoon or even from a tadpole-like fish? 

17 You put the difficulty of the first modification of the first protozoon admirably.

18 I dissent quite from what you say of the myriads of years it would take to people the world with such imagined protozoon.

19 Where swamps were drained and highways laid, the potential of malaria was unlocked in its worst form – Plasmodium falciparum – a deadly mosquito-borne protozoon.

1 原生动物

protozoan protozoic protoplast Protozoa