<span>The
difference in structure of the antennae and antennules is their size or length.
Antennae are long sensory organs while antennules are short or small sensory organs. These
organs are connected to the head of an insect, crab, or other animal and they
are used for taste, balance, smell, touch, air motion and vibration</span>
Most of the light passes through glass but none of the light passes through metal.
Answer:
Fertilized human egg becomes a solid ball of cells known as morula which then differentiate into blastocyst to fully grown human baby.
Explanation:
1. As the zygote is formed it starts to divide and multiply while moving toward the uterus to form a blastocyst within five days.
2. The blastocyst attaches to the wall of the uterus by implanting itself to the uterine lining
3. Within the 15 days of conception, placenta and umbilical cord starts developing to bring in nutrients and eliminate waste
4. The embryo differentiates into three layers- a) the endoderm, b) the mesoderm, and c) the ectoderm. These three layer form different parts of the body
5. By end of 4 weeks, embryo develops distinct head, tail and heart
6. By end of 10th week, limbs, eyes, brain regions, and vertebrae form
7. Around week 36 labors begins.
