If it goes in the nostrils the air is warmed and humidified. The tiny hairs) protect the nasal passageways and other parts of the respiratory tract, filtering out dust and other particles that enter the nose through the breathed air.
Answer: to explain what keystone species are important in each ecosystem
Explanation:
The overall theme of the article is to explain what keystone species are important in each ecosystem.
Keystone species is referred to as an organism that defines the ecosystem as a whole. They help define the habitat's biodiversity.
It should be noted that despite the fact that every living organisms depends on each other, some species are more vital than others and when they're removed, there will be a drastic change in the habitat.
Answer:
The upper lateral quadrant.
Explanation:
The breast is a glandular and fatty tissue that lies on the top of the pectoral muscles of the chest. It is made up of fatty tissues, glands, and connective tissue ligaments that attach it to the muscles.
The glands are the functional units as they are where the milk is produced. These glands are divided into 15 to 20 lobes of glands demarcated by fatty and connective tissues. Each lobe is made up of lobules where milk is produced. They are various ducts that carry the milk and they open up on the nipple.
The breast is usually divided into four imaginary quadrants during clinical examination. The upper lateral quadrant has an extension of breast tissues into the armpit. This is referred to as the Tail of Spence or axillary tail.
The tail of Spence has axillary lymph nodes around it and plays a key role in the diagnosis of breast cancer.
Answer:
Photosynthesis is the process of plants absorbing sunlight and carbon dioxide and making glucose and oxygen
Answer:
(A) A transversion base substitution causing a missense mutation
(B) A transition base substitution causing a silent mutation
(C) A transversion base substitution causing a silent mutation
Explanation:
There are two types of base substitutions, transversions and transitions. A transition is when the a purine base is substituted with another purine base or a pyrimidine base is substituted with a pyrimidine base (e.g. Purines - A to G; G to A; Pyrimidines - C to T; T to C). A transversion occurs when a purine base is substituted with a pyrimidine base or a pyrimidine base is substituted with a purine base (e.g. A to T; C to A).
There are three main types of mutations, these are missense mutations, nonsense mutations and silent mutations. Missense mutations occur when a base is changed and the codon now codes for a different amino acid to before the mutation. Nonsense mutations occur when a base is changed and now the codon codes for a stop codon causing a premature stop of the translation process. Silent mutations occur when a base is changed but the new codon still codes for the same amino acid as before the mutation.