Question

modern techniques like tissue culture are advanced forms of which type of propagation?
pollination - based propagation
sexual propagation
seed - based propagation
asexual propagation
question 2 (1 point)
according to the lesson, when did humans first begin to intentionally use asexual propagation methods like cuttings?
in ancient civilizations
during prehistoric times
in the 20th - 21st century
millions of years ago
question 3 (1 point)
what is the primary outcome of asexual propagation in plants?
the slow development of new plant varieties.
the formation of seeds through pollination.
the production of genetically identical clones.
the creation of genetically diverse offspring.

Explanation:

• Question 1: Tissue culture involves growing plant cells, tissues, or organs in an artificial medium. It does not involve pollination (which is part of sexual reproduction in plants), seeds (a product of sexual reproduction), or sexual propagation (which requires the union of gametes). Asexual propagation produces offspring that are genetically identical to the parent. Tissue culture is an advanced form of asexual propagation as it allows for the rapid multiplication of plants with the same genetic makeup as the parent plant.
• Question 2: Humans have been using asexual propagation methods like cuttings since ancient civilizations. For example, in ancient Egypt, Babylon, and China, people were aware of and practiced methods to propagate plants asexually to maintain desirable traits in crops and ornamental plants. Prehistoric times (option b) is too vague as there is more concrete evidence from ancient civilizations. The 20th - 21st century (option c) is too recent as these methods were used long before. Millions of years ago (option d) predates human intentional agricultural and horticultural practices.
• Question 3: In asexual propagation, there is no genetic recombination (unlike sexual reproduction). So, the offspring (plants) produced are genetically identical to the parent plant (clones). The slow development of new plant varieties (option a) is more related to sexual reproduction where genetic variation can lead to new varieties over time. The formation of seeds through pollination (option b) is a part of sexual reproduction. The creation of genetically diverse offspring (option d) is the outcome of sexual reproduction where gametes from two parents combine.

Answer:

• Question 1: d. Asexual propagation
• Question 2: a. In ancient civilizations
• Question 3: c. The production of genetically identical clones