<span>An immune response starts after a macrophage attacks a pathogen by engulfing and digesting them.</span>
The development of the unborn child's nervous system begins at about <u>5 weeks.</u>
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- A developing fetus's central nervous system begins as a straightforward structure termed the "neural groove," which folds into the "neural tube."
- The brain and spinal cord then develop from this. The brain tube should be closed and fused by day 28 following conception.
- Within her embryonic body, the neural plate, an oval-shaped disc of tissue, begins to form.
- Although the intricate elements of the brain continue to grow and develop through the end of pregnancy, development ends around the age of 25, the brain and nervous system of the embryo start to develop at just 5 weeks.
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Answer:
Option (a).
Explanation:
Restriction enzymes are also known as molecular scissors that are used to cleave the specific DNA strands. Two main types of restriction enzyme are restriction endonuclease and restriction exonuclease.
The restriction enzyme has the ability to cleave the DNA fragment at or near the specific sites. The ends generated by the restriction enzyme has the same length of both the strands.
Thus, the correct answer is option (b).
The chemical secreted by the tapeworm is noted to slow down the intestinal pulsation, if added to drug for humans it might increase the drugs effectiveness by ensuring the drug stays in the lower alimentary canal for long, ensuring maximum absorption the drug components into the body's blood stream as it will not be ejected from the body at the normal rate
Brain can process and store lot of information. Large brains means large heads, which makes childbirth more difficult and painful for human mothers.
Explanation:
A larger brain provides better performance. human brain size increases rapidly. Human brains are larger, more complex brains which enabled humans of this time period to interact with each other and with their surroundings in different ways.
The prefrontal cortex is slightly a larger part in the human brain. Humans have the largest cerebral cortex. It is a sheet of brain cells that folds itself multiple times in order to fit inside the skull. It enables us to process everything we see and hear and think.