The ________ is an embryonic midline structure common to all members of the phylum Chordata that serves as a source of midline signals to surrounding tissues and as a major skeletal element of the developing embryo.
notochord
The correct answer is notochord.
Signaling from the notochord involves the release of various molecules, most notably Sonic Hedgehog (Shh). Shh secreted by the notochord ventralizes the developing neural tube, influencing the differentiation of motor neurons, and also patterns the somites, which give rise to vertebrae, ribs, and muscles. The notochord's role as a skeletal element provides rigidity along the anteroposterior axis, allowing muscles to work efficiently for locomotion, particularly in aquatic forms.
Similar Questions
Herpetologist Deepak Veerappan has a ______ named after him which is known as 'Xylophis deepaki'.
Algae would generally NOT be found residing in which of the following?
- ____________ is an example of acoelomate.
The scientific name of Saccharomyces Cerevisiae, or “sugar-eating fungus” is given to which one of the following kitchen ingredient?
_______ is a branch of zoology that deals with the study of amphibians and reptiles.
Mozzarella, cheddar and camembert are varieties of:
- In which of the following animals are the stinging capsules located around the mouth and on the tentacles?
Which of the following is an example of perishable foods that CANNOT be stored for more than a day or two at room temperature, i.e., they have a shelf life of 1 or 2 days?
- Which of the following classes has the largest number of animals?
Which of the following statements is INCORRECT about redworms ?
Important Questions from Zoology
- In India, cows are classified under which scientific species name?
- Which of the following is an example of carnivore?
- Animals, which are active during night, are called _________.
- Which of the following are cultivated for the pearls they make?
- Which one of the following geologic time periods is associated with the first appearance of the marsupials?
