Question

reproduction is how living organisms produce new offspring. there are two main types of reproduction:

• asexual reproduction occurs when offspring inherit all of the genetic material from one parent.
• sexual reproduction occurs when each of two parents donates half of their genetic material to produce offspring that are genetically unique.

read each description. decide whether the organism reproduces sexually, asexually, or both.

1. sea trout

sea trout live in the sea or in estuaries, but they return to freshwater rivers to reproduce. the female sea trout digs a nest in gravel shallows and releases her eggs. one or more males then cover the eggs with sperm. once the eggs are fertilized, the female covers the eggs with gravel to protect them until they are ready to hatch.
do sea trout reproduce sexually, asexually, or both? explain how you know.

1. giardia

giardia is a parasite that commonly infects humans. if a person accidentally swallows giardia from a contaminated source, the parasite travels to the small intestine where it begins to feed off and absorb nutrients from the infected person. giardia multiplies by splitting into two identical copies, a process called binary fission. giardia infections can be treated with prescription drugs.
does giardia reproduce sexually, asexually, or both? explain how you know.

Explanation:

Question 1: Sea Trout Reproduction

Sexual reproduction requires genetic material from two parents (male and female). Sea trout have females laying eggs and males fertilizing them, so two parents contribute genetic material. Thus, sea trout reproduce sexually.

Asexual reproduction involves one parent and offspring with identical genetic material. Giardia multiplies by binary fission (splitting into two identical copies), a process of asexual reproduction (only one parent, offspring are clones). The description does not mention sexual reproduction (two parents contributing genetic material), so Giardia reproduces asexually.

Answer:

Sea trout reproduce sexually. This is because sexual reproduction involves genetic material from two parents, and in sea trout, females lay eggs that are fertilized by males (two parents contribute genetic material for the offspring).

Question 2: Giardia Reproduction