Sequences in mrna, such as uga, uaa, or uag, that tell a ribosome when to stop making a new protein are known as a) anticodons. b) stop codons. c) transfer rnas. d) genetic markers.

The answer is stop codons because stop codons cause the ribosome to let go of protein chain and end translation.

b brown mice / white sand dunes

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.