Primitive Groove

A depression that forms within the primitive streak that serves as an opening through which migrating cells pass into the deep layers of the embryo.

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#Id: 7109

#Unit 6. System Physiology – Plant

All fruits that ripen in response to ethylene exhibit a characteristic respiratory rise before the ripening phase called a climacteric.

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#Id: 7367

#Unit 5. Developmental Biology

In Drosophila, during the ninth division cycle- Pole cells determination 

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#Id: 5489

#Unit 10. Ecological Principles

Reproductive strategies

1.Semelparity

2.Iteroparity

Semelparity - When organisms reproduce only once during their life

Ex- insects, other invertebrates, and occurs in organisms such as salmon, bamboo grasses, and agave plants

Iteroparity - When organisms reproduce multiple times during their life.

It is common in most vertebrates and perennial plants, such as trees

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#Id: 7227

#Unit 5. Developmental Biology

T-cell education

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#Id: 6414

#Unit 2. Cellular Organization