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☆☆☆☆☆The endocrine system affects cells with certain receptors .
The nervous system can affect only nearby cells
Some times both ovaries produce individual egg. Then both ovum gets fertilized and Fraternal twins happens
One egg from each ovary is fertilized
Identical twins start out as one egg that for some reason splits in two, and both halves develops into individuals. Genetically, they have to be the same.
They have the same DNA.
Muscular.-- Jazz(;
Two different alleles for the same trait are heterozygous.
No, Its homozygous. This answer is incorrect as homo = same.
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.
One gland causes calcium ions to be released; another gland causes them to be absorbed
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
A sperm or egg
eyes develop
lips start to form
Vocal cords develop.
A disadvantage of a vitro experiment is that the results can be misleading.
If it is the fatter bone in the leg, then it is the tibia
it makes the body create memory cells for future infections
Testosterone is a hormone that is responsible for many of the physical characteristics specific to adult males. It plays a key role in reproduction and the maintenance of bone and muscle strength.
