Question

How did the earliest chordates obtain food?

a. They were filter-feeders
b. They were herbivores, consuming photosynthetic algae.
c. They had symbiotic green algae that produced most of their energy.
d. They were predators, catching mostly marine crustaceans.
e. They were decomposers, consuming dead worms and crustaceans.

Answer 1

a. They were filter-feeders

Step-by-step explanation:

The earliest chordates obtain their foods by filter feeding.

Chordates generally refers to animals in the phylum Chordata. They posses the following basic characteristics:

• They posses notochord throughout or at some points in their life cycles.

• They posses dorsal hollow nerve cord at some points or throughout their life cycles.

• They posses a tail at a certain point or throughout their lives.
• The posses pharyngeal gill slits also at some points or throughout the lives.

The earliest chordates are known to be marine in nature and they include tunicates and lancelets. They mostly feed by filter feeding.

The correct option is a.

Answer 2

Answer: Option A.

They were filter feeders.

Step-by-step explanation:

The first chordates appear in the Cambrian period and the fossil record shows it to be around 530 milion years ago. This chordates was found in China and recorded in 1995.

The earliest chordates obtain food by filter feeding. They taking in water through the mouth and filter the feed through gills silts.

Chordates characteristics are;

They have notochord.

They have hollow nerve