問題一覧
1
What are three most common shapes of bacteria?
Rod, Spiral , Sphere
2
Q2- What are bacteria and Archie classified into diffrent domains?
- Archea are biochemically and genetically diffrent from bacteria
3
Name and describe the main parts of a typical virus.
A typical virus consists of: Capsid: Protein coat Genetic Material: DNA or RNA. Envelope: Lipid membrane (if present).
4
What are the differences between a lytic infection and lysogenic infection ? Include the effects of each type of Infection on the cells of the host organism in your answer
Lytic infection destroys the host cell; lysogenic infection integrates into the host’s genome and remains dormant
5
Apply Researchers studying infections can often grow bacteria more easily than they can grow viruses.What conditions must scientists provide for viruses to multiply?-
In order to replicate , viruses and living cells they can infect.
6
Classify A wart is caused by a virus that may lie dormant for years before and symptoms appear. Does this resemble a lytic or lysogenic infection ?Explain.
- Lysogenic infection; its. characterized by a virus that lies dormant
7
Q1- What are two ways in which bacteria can cause diseases ?
Invade tissues and attack cells directly or make atoxin that is carried by the blood
8
Q2-How can antibiotics stop bacterial infections ?
By disrupting cell wall synthesis in bacteria
9
Name and describe the three basic means of movement used by animal-like protists.
Animal-like protists move using Flagella: Whip-like propulsion Cilia: Coordinated hair-like movement Pseudopodia: Extensions for crawling.
10
Infer Why do amoebas from pseudopods only when they need them?
Because pseudopod formation required energy.
11
Scientists are rethinking the way protists are classified because
.protists are too diverse to group in one kingdom.
12
Animal-like protists eat other organisms, so they are
heterotrophic.
13
Protists are classified into the domain
Eukarya.
14
A plantlike protist may be single-celled, colonial, or multicellular, but it is always
photosynthetic
15
The definition of a protist is a eukaryote that is
not an animal, plant, or fungus.
16
Algae are similar to plants because they have
. chlorophyll for photosynthesis.
17
Single-celled plantlike protists and photosynthetic bacteria make up communities of
phytoplankton.
18
.A flexible coat-like covering on the cell surface of euglenoids is called a
pellicle.
19
Both plants and green algae have cell walls made of
cellulose.
20
Which of the following protists can heavily populate the oceans when nutrients are ample and create what is known as a red tide?
dinoflagellates
21
a temporary extension of cytoplasm
Pseudopod:
22
short hairlike structures used for movement
cilia
23
an animal-like protist.
Protozoa:
24
plantlike protest
Algae:
25
What can funguslike protists do that fungi cannot?
move
26
Under a microscope, water-mold cells look like
branching strands.
27
Ireland’s potato famine was caused by Phytophthora infestans, which is a form of
water mold.
28
Cellular slime molds are commonly found
in soil
29
Plasmodial slime mold cytoplasm contains multiple
nuclei