Determine if the statement is true or false. If false, replace the word(s) in bold with the correct word(s) on the line. If true, write "true" on the line. Bacteria are multiple-celled microscopic organisms.

Bacteria are the most abundant form of life on Earth.

Your digestive tract is home to billions of bacteria.

Vitamins are a type of medication used to kill bacteria.

Common bacterial shapes are rods, spheres, and cones.

Cilia or legs are used for locomotion in some bacteria.

In general, bacteria consist of a nucleus, ribosomes, and a cell wall.

Some types of bacteria can make their own energy through photosynthesis.

Fusion is a form of asexual reproduction where two identical cells are formed from one parent cell.

Some bacteria can exchange genetic material with each other using a thin tube that connects them.

Bacteria can multiply and grow larger quickly.

Scientists think that bacteria evolved around 3.5 billion years ago.

The statements can be True or False as:

1. The given statement is False. Bacteria are single-celled or unicellular prokaryotic organisms.

2. The given statement is true. Bacteria are the most abundant forms of life on earth, such that they are found in extreme temperatures.

3. The given statement is True. The digestive tract is composed of billions of bacteria, which help in the breakdown of molecules.

4. The given statement is False. The vitamins are nutritive substances, which can cause deficiency diseases.

5. The given statement is True. The bacteria exist in different forms and shapes, such as rods, cones, and spherical.

6. The given statement is False. Flagella are the filamentous structures used for locomotion.

7. The given statement is False. The bacteria are prokaryotes and lack membrane-bound organelles like the nucleus, ribosomes, and mitochondria.

8. The given statement is True. The bacteria such as cyanobacteria perform photosynthesis.

9. The given statement is False. The bacteria reproduced through binary fission or conjugation.

10. The given statement is True. Conjugation or transduction is a process through which bacteria exchange genes.

11. The given statement is True. The bacteria grow exponentially and multiply at a very fast rate.

12. The given statement is True. The origin of bacteria dates back to 3.5 million years ago.

Thus, the bacteria are prokaryotic organisms, which are found at extreme temperatures and undergo asexual reproduction.

To know more about bacteria, refer to the following link:

link

Explanation:

The fundamental microscopic components of all species are cells. Two groups of cells, Prokaryotes and Eukaryotes, exist.  Prokaryotic (meaning pro: before and Karyon: for kernel/nut) identifies species that do not have membranes surrounded by a cell nucleus or other organelles.

Bacteria, thought to have evolved 3.5 billion years ago are types of prokaryotes and are the oldest forms of life on earth. As single- celled life forms, they take on various shapes (rods, cones, spheres, spirals) and are capable of reproduction through asexual binary fission, and exchange genes in horizontal gene transfer (conjugation, transduction etc) and cell fusion .

They live in communities and, grow exponentially in number over short periods of time.  Some are autotrophs, capable of producing their own food through photosynthesis. Some species can move around using flagella, long whip-like projections from the cell.

In humans, bacteria have colonized the intestinal tract. While some are beneficial as part of the microbiome, others are disease-causing pathogens- these are typically eliminated via the use of antibiotics.

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