A mule is a hybrid between a horse and a donkey (a male horse and a female donkey). Mules cannot produce offspring so it is under Hybrid Sterility, which falls under Letter D: a postzygotic barrier.
A postzygotic barrier diminishes the ability to reproduce of hybrid offsprings.
Answer:
if im not mistaken the answer should be the first one
Answer:
Nitrogen, Oxygen, all layers
Explanation:
Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. These gases are found in layers (troposphere, stratosphere, mesosphere, thermosphere, and exosphere) defined by unique features such as temperature and pressure.
Answer:
Earth worms,Snails ,starfish I think
Answer:
B
Explanation:
B: Since the drug inhibits transcription, only the mRNA that have already been transcribed can go on to be translated into the protein.
A: All proteins need Transfer RNA in order to be made.
C: Nuclear proteins are first made in the cytoplasm by ribosomes and then transported back to the nucleus via the nuclear pore complex.
D: Transcription is necessary for protein synthesis. This step cannot be skipped. Otherwise, no mRNA is made and translation cannot occur.