Question

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.

Answer 1

Answer:

1. False Bacteria are multiple-celled microscopic organisms.
2. True  Bacteria are the most abundant form of life on Earth.
3. True  Your digestive tract is home to billions of bacteria.
4. False Vitamins are a type of medication used to kill bacteria.
5. True  Common bacterial shapes are rods, spheres, and cones.
6. False  Cilia or legs are used for locomotion in some bacteria.
7. False In general, bacteria consist of a nucleus, ribosomes, and cell wall.
8. True  Some types of bacteria can make their own energy through photosynthesis.
9. False Fusion is a form of asexual reproduction where two identical cells are formed from one parent cell.
10. True  Some bacteria can exchange genetic material with each other using a thin tube that connects them.
11. True  Bacteria can multiply and grow larger quickly.
12. True Scientists think that bacteria evolved around 3.5 billion years ago.

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.