Invertabrates

Which of the following groups does NOT exhibit bilateral symmetry?

• annelids
• jellies
• chordates
• molluscs
• arthropods

Which of the following is a characteristic of cnidarians?

• bilateral symmertry
• a lack of true tissues
• triploblastic bodies
• mesoderm
• ectoderm and endoderm

Tags

NGSS.MS-LS4-2

A true coelom is __________. 

• a thoracic body cavity
• a body cavity lined with mesoderm
• a body cavity lined with tissues derived from the endoderm
• an abdominal body cavity
• a body cavity lined with endoderm and mesoderm

Tags

NGSS.MS-LS4-2

One of the primary developmental/anatomical characteristics distinguishing the major animal phyla is the condition of the body cavity. A pseudocoelomate animal is one in which the body cavity is __________.

• lined on one side by mesoderm and on ther other side by endoderm
• bounded completely by mesoderm
• bounded parly by ectoderm
• filled by a solid mass of mesoderm
• bounded completely by endoderm

The presence of a coelom is advantageous because __________.

• it allows room for the development and movement of internal organs
• it permits the development of an open circulatory system
• it allows for a third embyronic germ layer
• it is a requirement for a complete digestive tract
• all of the listed responses are correct

Unlike other animals, sponges __________.

• are unicellular
• lack a coelom
• lack true tissues
• exhibit bilateral symmetry
• possess cell walls

Sponges feed by _________.

• performing photosynthesis
• filtering small particles form water
• paralyzing small crustaceans with stinging cells
• absorbing nutrients from the guts of their hosts
• scraping bacteria and algae from hard substrates

Sponges lack ___________.

• the ability to make organic compounds from CO2 and water
• a complete digestive tract
• a nervous system
• true tissues
• all of the listed responses are correct

Question 3:Some digestion in sponges takes place in the __________

• amoebocytes
• osculum
• gastrointestinal tract
• gastrovascular cavity
• spongocoel

Which of the following is/are characteristic of sponges?

• they have collar cells
• they consist of two layers of cells with a noncellular gelatinous layer between them
• they have holes, or pores, in specialized cells, through which water enters
• all of the listed responses are correct
• None of the listed responses are correct