The pig embryo or fetus are both developmental stages in a pig's life cycle from conception and leading up to birth. The embryo and the fetus should be found in the uterus lining of the female pig, as this is where conception would occur and where the fetus will develop until it is ready to be born.
Answer: Abiotic factors in a tropical rainforest include temperature, humidity, soil composition, air, and many others. A few of the many biotic factors in a rainforest would include toucans, frogs, snakes, and anteaters.
Explanation: abiotic factors are non-living things. biotic factors are living things. they both impact the organism living in the environment. remember all biotic factors are dependent among abiotic factors.
Chromosomes are lined up in the middle of the cell during metaphase.
Answer:
1. Signaling molecule
2. Signaling receptors
Explanation:
Hormones, growth factors, neurotransmitters, etc. serve the function of signaling molecules for cells. These molecules are released by one cell and bind to the receptors present on/in the target cells to elicit the desired response. Thereby, the signaling molecules serve in cell-cell communication.
For example, insulin hormone synthesized and released from beta cells of pancreas binds to its cell surface receptors present on the surfaces of liver cells and muscle cells to stimulate the uptake of the glucose from the blood.
Likewise, neurotransmitters released from the presynaptic neuron bind to receptors present on the membrane of postsynaptic neuron and serve to carry the nerve impulse to the postsynaptic neuron.
It is best defined as a "proposed explanation".
