In human chromosomes, satellite DNA sequences of about 170 base pairs in length are present in tandem arrays of up to 1 million base pairs. Found mainly in centromere regions, these DNA sequences are called .

The correct answer to fill in the blank is: Alphoid families.

Explanation:

Alphoid repetitive DNA is found in the centromeres. This satellite DNA constitutes an important portion of heterochromatin and consists of a large array of non-coding DNA that repeats tandemly (meaning that one gene is duplicated and can be found adjacent to the original copy).

Non-coding DNAs are DNA sequences that do not encode for any proteins.

cuz they cant breath

explanation:

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.