Use the information and diagrams to answer the questions.
Astrammina rara is a unicellular organism that is several millimeters long. This organism lives on the ocean floor of Antarctica in an area called Explorer's Cove. Astrammina rara builds a shell by cementing grains of sand from the ocean floor together.
The organism either absorbs nutrients from the water or eats other organisms on the ocean fibor. The offspring of Astrammina rara have genes identical to the parent. Below is a diagram of an Astrammina rara and a map showing where the organism lives.
Asexual reproduction by Astrammina rara
O A involves an egg and a sperm
• B. Requires a male and a female
• C. Reduces the variation in the offspring
• D. Increases the variation in the offspring