Which describes a difference between birds and mammals? Birds protect and feed their young
O Birds have nearly hollow bones,
O Birds undergo internal fertilization,
O Birds efficiently transport oxygen to cells,

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).

Organelles found in plant cells that function through photosynthesis to produce glucose from carbon dioxide and water are called — question 21 options: chloroplasts guard cells photosynthons

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?