(B) In an angiosperm ovule,the $nucellus$ is the central mass of tissue that contains the embryo sac. This $nucellus$ is protected by one or two prote

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(B) In an angiosperm ovule,the $nucellus$ is the central mass of tissue that contains the embryo sac. This $nucellus$ is protected by one or two protective envelopes known as $integuments$. These $integuments$ surround the $nucellus$ except at the tip where a small opening called the $micropyle$ is present.