Answer:
<u>stonewort, and many green algae such as the Spirogyra.</u>
Explanation:
- As it was believed that the land algae were believed to be evolved from the stonewort plant and the blue-green algae like the cyanobacteria and the spirogyra that colonized the lands some 500 mn years ago was a freshwater alga.
- After which the first land plants occur about 470 million years ago, and they were in the form s of moss and liverworts of the vascular in origin.
The answer to this question is CCR or Central Contractor Registration. The CCR was the main supplier database intended for the United States Federal government. The CCR is the source where it collected data from suppliers, validated and stored the data, disseminated it to various branches in the government acquisition agencies.
Answer:
Six hours
Explanation:
Given that;
A microbiologist inoculates a flask of broth with 1 ml of 100 bacterial cells/ml
Also, the generation time of the species is 1 hour and there is no lag phase
i.e there is no period where the individual bacteria are maturing, this will enhance a faster replication
So , since the generation time is 1 hour and we are being given 100 bacterial cells/ml
∴
After 1 hour = replication of the bacterial cells would have been doubled to =200 bacterial cells
2nd hour = 400 bacterial cells
3rd hour = 800 bacterial cells
4th hour = 1600 bacterial cells
5th hour = 3200 bacterial cells
6th hour = 6400 bacterial cells
∴ We can see that at the 6th hour, the culture has contained more than 6,000 cells/ml
