BIOLOGY HELP PLEASE

Which domain(s) are made up of single-celled organisms that lack a nucleus and organelles?

Question 17 options:

Domain Eukarya and Domain Bacteria.

Domain Bacteria only.

Domain Bacteria and Archaea.

Question 18 (2 points) Question 18 Unsaved
Which of the following is not considered to be living therefore is not included in a Domain?

Question 18 options:

Viruses

Bacteria

Eukaryotes

The digestive system breaks down nutrients so that they can be absorbed by the bloodstream and carried to all of the body’s cells. Which of the following traces the path of food as it passes through the digestive tract?

Question 21 options:

Mouth, Stomach, Esophagus, Small intestine, Large intestine.

Mouth, Esophagus, Stomach, Small intestine, Large intestine.

Mouth, Stomach, Large intestine, Small intestine, Esophagus

are all heterotrophic, while can be either heterotrophic or autotrophic.

Question 23 options:

Fungi, Protists

Protists, Fungi

Plants, Protists

Question 24 (2 points) Question 24 Unsaved
Which statement best describes the role of the lung in gas exchange?

Question 24 options:

It takes in oxygen from the bloodstream.

It takes in oxygen from water.

It extracts oxygen from the atmosphere for use by body cells.

Bacteria and archaebacteria includes single celled organisms in which membrane bound cell organelles such as mitochondria, chloroplast are absent. membrane bound nucleus is also absent. They have incipient nucleus.

Answer 18. Viruses.

Viruses are not included in Domain as they are not cellular organisms. viruses are connecting link between living and non-livings.

Answer 21. Mouth, Esophagus, Stomach, Small intestine, Large intestine.

Answer 23. Fungi, Protists.

Fungi are either saprophytes or parasites. Hence, they are nutritionally heterortrophic. Protists are either autographs or heterotrophs.

Answer 24. It extracts oxygen from the atmosphere for use by body cells. Oxygen is inhaled during breathing. It reaches to the lungs where exchange of gases occurs.