Biologists now know that viruses
a. are the smallest living organisms.
b. consist of a protein surrounded by a nucleic acid coat.
c. contain RNA or DNA in a protein coat.
d. all form the same crystalline shape.
Is it c?
Which of the following is NOT a characteristic of animals?
a. All of their cells are diploid.
b. They have specialized tissue called "muscle."
c. They are always multicellular.
d. Their cells lack a cell wall.
Characteristics that biologists use to classify organisms are
a. convergent evolution, cladogram, reproductive isolation.
b. reproductive isolation, evolutionary history, shared derived characteristics.
c. binomial nomenclature, shared derived characteristics, evolutionary systematics.
d. derived cladistics, evolutionary history, convergent evolution.
Is it c?
4 Responses
Sophia J
06 Feb 2010
¿ // 馬 ?
06 Feb 2010
c <–correct!
b
b
Go through your textbook for this.
[Answers: see above]
scottsdalehigh64
06 Feb 2010
C.
A. The spermatozoa and oocytes are haploid.
C.
r2
06 Feb 2010
1 is c
#2 is d
Yes, your first answer is correct, C.
The third question is poorly worded. I think they must want B. since those are all characteristics of organisms and not examples of methodologies.
The second question is more tricky. A. could be your answer because sex cells are haploid, some animals are entirely haploid or triploid, and certain cells in our bodies (like liver cells) are routinely polyploid. But, B. could also be a correct answer if the intent is that it has to apply to all animals. Sponges don’t have muscle, but muscle is a specialized tissue found in animals. I’d go with A.