Thursday
April 24, 2014

Homework Help: Biology

Posted by mysterychicken on Friday, February 19, 2010 at 10:52am.

19. Which is NOT a general characteristic of plants?
a. use oxygen to make usable energy
b. primary producers
c. have specialized cells
d. cell walls composed of cellulose
I think it might be either A or B...

20. Which of the following are characteristics of all animals?
a. multicellular, haploid cells that divide by mitosis, organisms with organ systems
b. multistage zygote development, vertebrates, reproduce sexually
c. 99 percent invertebrates, heterotrophs, multicellular
d. both A and C
D? Or just C?

23. A typical virus consists of a
a. protein coat and a cytoplasm core
b. carbohydrate coat and nucleic acid core
c. protein coat and a nucleic acid core
d. polysaccharide coat and protein core
C?

24. During initial HIV infection, the HIV virus attaches to CD4 receptors on a macrophage and then
a. attaches to a CCR5 receptor before it's able to enter the cell
b. enters the cell through the CD4 receptors
c. attaches to a lymphocyte that attempts to fight the virus on the macrophage.
d. HIV tricks the reverse transcriptase of the infected cell into making copies of the viral RNA molecule.
A?

-MC

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Biology - 19. Which is NOT a general characteristic of plants? a. use oxygen to ...
Biology - 19. Which is NOT a general characteristic of plants? a. use oxygen to ...
Biology - Bacterial cells are prokaryotic. Select two structures of bacterial ...
botany - what is the difference between primary walls and secondary walls in ...
science help ASAP please - 1. Angiosperms have organs such as ______________ and...
BIOLOGY - IS A PLANT CELL AN EXAMPLE OF A UNICELLULAR ORGANISM? iS AN ANT AN ...
biology - specialized cells in animals are all descended from a single ancestor ...
science - A pyramid of numbers demonstrates that a community has a) producers ...
science - why do plants cell have rigid cell walls while animals cells dont have...
A cell crossword puzzle (sci.) - the cells of plants and algae have a hard __ ...

Search
Members