It's impossible to give a definitive list of all organisms that reproduce sexually. However, we can say that sexual reproduction is a very common mode of reproduction, and it's found in a wide range of organisms, including:

* Animals: Most animal species, from insects to mammals, reproduce sexually. This includes humans, dogs, cats, fish, birds, and many more.

* Plants: Many plant species, including flowering plants, conifers, and ferns, reproduce sexually.

* Fungi: Most fungi reproduce sexually at some point in their life cycle.

* Algae: Some algae reproduce sexually, while others reproduce asexually.

* Protists: Some protists reproduce sexually, while others reproduce asexually.

Key Characteristics of Sexual Reproduction:

* Involves two parents: Sexual reproduction requires the fusion of genetic material from two parents.

* Production of gametes: Specialized reproductive cells called gametes (sperm and egg in animals) are produced through meiosis, a cell division process that halves the number of chromosomes.

* Genetic variation: Sexual reproduction leads to offspring that are genetically different from their parents, contributing to diversity within a species.

Note: While sexual reproduction is very common, some organisms reproduce asexually, meaning they can create offspring without the involvement of another individual. Examples include bacteria, some fungi, and some plants.