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At times, unfavorable environmental conditions can cause one gender of a certain population of organisms to drastically decline. During such times, the other gender makes up for the decline by reproducing on its own. This type of reproduction is called __________. The first vertebrate organism to have successfully produced offspring in this manner is the _______.

1a. Broadcast Spawning
b. Parthenogenesis
c. Pollination

2a. Elephant
b. Guppy
c. Sawfish

Respuesta :

1.broadcast spawning 2.guppy

Reproduction is defined as the manner to produce offspring. When a species reproduces on its own then, it is called parthenogenesis and was observed in Guppy. Thus, options 1. b, and 2. b are correct.

What is parthenogenesis?

Parthenogenesis is the asexual reproduction in which the offspring are produced from a single parent. These embryos get developed from the unfertilized egg cell of the female species.

It is widely seen in the lower animals and few invertebrates. They are advantageous when the conditions are not favorable for the offspring to be produced. They take place when the sperm does not participate in egg fertilization. In vertebrates, it was first seen in Guppy fish.

Therefore, the production of the offspring by a single parent without fertilization is called parthenogenesis.

Learn more about parthenogenesis here:

https://brainly.com/question/12040177

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