A lit candle needs to draw oxygen from the air in order to continue burning. If you limit the amount of air available, the candle's flame eventually goes out once it uses up all the oxygen. Lit candles in smaller jar stop burning first because the oxygen trapped in the jar are fewer than the ones in bigger jars.
Answer:
genetic engineering is possible because all organisms are based on the same. genetic code. scientists can study the effect of turning off a gene by using. gene knockout ... a ring of bacterial dna with foreign DNA inserted ... transgenic organisms can express the foreign genes because all organisms are bases on the same.
Explanation:
Answer:
A) the cannon bard theory.
Explanation:
the cannon bard theory is an emotion that reflects that trigger feelings and physical reactions at the same time. in this specific example fear would be a feeling and running would be a physical response. could also be described as fight or flight response.
During sperm penetration, human eggs are still surrounded by follicular cells.
Therefore, the correct answer is Option D.
<h3>What changes does egg undergo for fertilization?</h3>
- An egg goes through a few changes at the hour of sperm penetration during fertilization.
- These progressions happen at the cell surface, in development, physiology and gene expression.
- For fertilization, a sperm should combine with the cell membrane and afterward infiltrate the egg cells.
- Infiltration through the egg cell or extracellular matrix (ECM) is a troublesome task.
- The acrosome of the egg goes through acrosomal reaction to get through the hard shell of cell.
- To go through the follicle cells encompassing the egg or oocyte, the sperm discharges hyaluronidase enzyme.
- This chemical isn't delivered until the sperm comes into contact with the egg cell's zona pellucida.
Learn more about fertilization here:
brainly.com/question/18117670
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