Answer:
Girls have two X chromosomes and boys have chromosomes (XY).
Explanation:
Girls have two X chromosomes (XX), and boys have one X and one Y chromosome (XY). Whether a baby will be a boy or a girl is determined at the time of conception.
A) is the correct answer
And atom contains a nucleus consisting of positively and neutrally charged particles, called protons and neutrons and also has shells of electrons that are negatively charged particles that surround the nucleus.
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Answer:
chloroplast
Explanation:
it's where chlorophyll is found and chlorophyll (the green colouring pigment) is needed for photosynthesis
Answer:
B) Tissue is made of different types of cells.
D) Organs are made of different types of tissue.
Explanation:
The tissues are made of different types of cells. The organs are also made of different types of tissue. There is no need of same types of tissues to make organs. Thus, option (B) and (D) is correct answer.