Red blood cells contain enormous amounts of a protein called hemoglobin. This iron-containing molecule binds oxygen as oxygen molecules enter blood vessels in the lungs. Hemoglobin is also responsible for the characteristic red color of blood.

3 0

3 years ago

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Answer quickly please

Nuetrik [128]

B, the others are not testable under lab conditions.

8 0

2 years ago

How much coal will be produced in the year 2020 for EACH region

earnstyle [38]

Until now it is estimated U.S. coal production totaled about 9.1 million short tons (MMst) 27%lower than last year.

East of mississippi river totaled 3.7 MMst

West of mississippi river totaled 5.4 MMst

The supply of both types of coal is expected to decline as production from Appalachia falls from 201.5 million tons in 2018 to 170.1 million tons in 2020.

5 0

3 years ago

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Describe the relationship between group and individual behaviors in animals.

Fofino [41]

Explanation: Animal social behavior, the suite of interactions that occur between two or more individual animals, usually of the same species, when they form simple aggregations, cooperate in sexual or parental behavior, engage in disputes over territory and access to mates, or simply communicate across space.

5 0

4 years ago