The nervous system is derived from     ectoderm     endoderm     mesoderm     All of the above: it depends on whether the animal is a protostome or a deuterostome      QUESTION 7 Planarians lack dedicated respiratory and circulatory systems because     none of their cells are far removed from the gastrovascular cavity or from the external environment.     they lack mesoderm as embryos and therefore lack the adult tissues derived from mesoderm.     their flame bulbs can carry out respiratory and circulatory functions.     their pseudocoelom carries out these functions.     QUESTION 8 Animals with bilateral symmetry     can be divided into similar halves by any plane through the longitudinal axis.     are usually very slow-moving organisms.     are relatively simple in structure.     are better adapted for forward movement than radially symmetrical organis

Question
  1. The nervous system is derived from

       

    ectoderm

       

    endoderm

       

    mesoderm

       

    All of the above: it depends on whether the animal is a protostome or a deuterostome

     

  

QUESTION 7

  1. Planarians lack dedicated respiratory and circulatory systems because

       

    none of their cells are far removed from the gastrovascular cavity or from the external environment.

       

    they lack mesoderm as embryos and therefore lack the adult tissues derived from mesoderm.

       

    their flame bulbs can carry out respiratory and circulatory functions.

       

    their pseudocoelom carries out these functions.

     

 

QUESTION 8

  1. Animals with bilateral symmetry

       

    can be divided into similar halves by any plane through the longitudinal axis.

       

    are usually very slow-moving organisms.

       

    are relatively simple in structure.

       

    are better adapted for forward movement than radially symmetrical organisms.



    Help with these Questions please 
    thank you!

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Biology

Zoology

Related Biology Q&A

Find answers to questions asked by students like you.

Q: Complete the table below

A: The lymphatic system is part of the circulatory and immune system. It includes large network of lymp...

Q: I need explanation for the why the answer is correct? And why would the other options wrong

A: Phases of cell division include :  Prophase  Metaphase  Anaphase  Telophase  Option a ( anaphase )...

Q: What are symptoms of plant water relations?

A: Water is vital for life and important for the survival of all plants. Water is also necessary for th...

Q: The small circular pieces of DNA that can be transferred into bacteria are called

A: DNA is the hereditary material present in human beings and most other organisms. It is a molecule th...

Q: Many people find that they become ill with a cold after traveling by airplane. The air circulation s...

A: Studies have shown that more than one in five people who travel on planes suffers from a cold or the...

Q: If you zoom on the cells at the outermostlayer of this section of skin, what do you notice about the...

A: BASIC INFORMATION  COMPOUND EPITHELIUM It is formed by the various layers of cells. The bottom most...

Q: Are Golgi Type I neurons a type of interneuron?

A: INTERNEURONS:- Found in the central nervous system. Present in the brain and spinal cord. This is al...

Q: Tatuo Aida investigated the genetic basis of color variation in the medaka (Aplocheilus latipes), a ...

A: Homozygous red fish will have the genotype: bbRR and a homozygous white fish will have the genotype:...

Q: What type of structures lead to transcription termination?

A: Transcription is the cycle by which the data in a strand of DNA (deoxyribonucleic acid) is duplicate...

Q: Males can be said to be ‘weaker’ genetically because they are predisposed to disorders that are a re...

A: Males can be said to be ‘weaker’ genetically because they are predisposed to disorders that are a re...

Q: What are the three main types of passive transport?

A: Basic information  TRANSPORT  It is necessary in plants because in plants they do not have any organ...

Q: Describe several moist heat methods and their chief applicationsfor sterilization and disinfection.

A: A temperature higher than the normal temperature or suitable temperature for the growth of the micro...

Q: A single strand of DNA, 24 nucleotides long, with the sequence 5'-TTTCCCgggAAAgggTTTAAAggg-3' is in ...

A: The given ssDNA would serve as a template strand for the synthesis of a complementary strand to form...

Q: Humans may carry both staphylococci and streptococci as normal microbiota. How might you easily diff...

A: There are basically two genera of bacteria of Streptococcus and Staphylococcus which are present in ...

Q: what were the earliest members of the genus Homo?

A: Human evolution is the evolutionary path that led to the development of anatomically modern humans, ...

Q: Why are oncogenes usually dominant in their action, whereas tumor-suppressor genes are recessive?

A: BASIC INFORMATION ONCOGENES When there is alteration in the proto-onco genes then it leads to the f...

Q: The number of protein-encoding genes in a prokaryotic cell equals the number of proteins that can be...

A: Genes encode proteins and dictate cellular functions. The genes expressed in a particular cell deter...

Q: What percentage of human genes are regulatory genes? what about all organisms in general?

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that con...

Q: How does the formation of lactic acid affect the human body? Check all that apply.   ...

A: Cellular respiration is of two types Aerobic and anaerobic respiration. Aerobic respiration uses oxy...

Q: Answer the following questions with respect to both Clonorchis and Schistosoma: (a) how do humans be...

A: Fluke, any individual from the invertebrate class Trematode (phylum Platyhelminthes), a gathering of...

Q: What are taenias? What arethe diseases caused by them?

A: Parasites are the organisms that depend on hosts for food and nutrition.

Q: Which of the following is not a characteristic of viruses that makes them difficult for drug develop...

A: Viruses are ultra-microscopic particles that are inert outside the host body but are living inside l...

Q: Which of the following statements regarding mitosis and meiosis is false? All the events unique to...

A: Meiosis is a cell division which results in four haploid daughter cell. Meiosis is the process of pr...

Q: What specific purposes do sedimentation, coagulation,filtration, and disinfection accomplish in the ...

A: Earth is so far the only planet that has the capability to sustain life on it. There are many factor...

Q: Many antimicrobials were discovered in the first half of the 20th century. Match the early antimicro...

A: Antimicrobial drugs are those which either kill the microorganisms or prevent their growth. These ca...

Q: ccu ccc cca ccg is a generic code

A: The genetic code is a system of triple letter codons that are made up of a combination of the differ...

Q: Function of proteins in the ETC (electron transport chain)?   energy of proteins use...

A: Electron transport chain:- Is a series of complexes that transfer electrons From electron donors to ...

Q: Epigenesis relating to genetics refers to which of the following      A. Genetic information i...

A: Genetics is a study of genes, heredity, and genetic variation in an organism. Living organisms inher...

Q: What special adaptation has evolved in CAM plants such as cacti and stonecrops that allows CO2 fixat...

A: Plants and even all the living organisms has evolved special adaptation so as it survive in the envi...

Q: How has variation in fossil H, Sapiens been interpreted?

A: Fossils are the remains or traces of ancient life that have been preserved by natural processes. Exa...

Q: Locate and name the largest foramen in theskull.

A: A foramen is defined as an open hole which is present in extant or extinct amniotes and typically al...

Q: anatomy which one is the answer?

A: Nerve cells or neurons are excitable cells of nervous system. A typical neuron consists of cell body...

Q: Summed twitches create a greater amount of tension in skeletal muscle cells because NOTE: select all...

A: A muscle twitch is a condition in which the muscles in our body involuntary contracts that are contr...

Q: a) Explain the thermoregulatory mechanisms that would be maintaining Calvin's core body temperature ...

A: The tight regulation of temperature inside the body is called thermoregulation.  In this process, th...