Genetics

The major organs systems have started developing.

viruses are not alive. APEX

Some times both ovaries produce individual egg. Then both ovum gets fertilized and Fraternal twins happens

One egg from each ovary is fertilized

Nutrients are absorbed into the bloodstream. Starch is broken down by enzymes.

Macromolecules are broken down.

The circulatory system is its own system. There are not systems in the circulatory system.

gene flow

The genotype is either BB or BO. The antigens on the blood cell are B and the antibodies in the blood plasma are A.

When there are limited resources.

when there is competition for resources. apex :)

Small intestine

Esophagus - APEX

The parts of the alimentary canal are:

The Mouth

The Pharynx

The Stomach

The small intestine

The large intestine

The endocrine system sends messages using hormones. It delivers messages from the nervous system to the excretory system. It tells the excretory system when the blood is out of balance.

Depends on when you consider it a child. First it's a Zygote, a fertilized egg, and then a blastocyst. Medically it's not a child until it's born. But if we start with embryo you can read all about it in the link below. Someone wrote blood starts pumping and arms starts to develop but that is weeks later.

Blood pumps through the body.

or

Rhythmic breathing movements

the organs grow larger

DNA Polymerase are proteins that cells use to copy DNA.

Neurons aren't able to communicate with each other.

B cells

eyes develop

lips start to form

Vocal cords develop.

A mutation in a sex cell can be passed on to an offspring. A mutation in a non-sex cell cannot be passed on to an offspring.

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