1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Phoenix [80]
3 years ago
9

Which of these instruments is BEST used for observing a single-celled organism like the one seen here? A) hand lens B) watch gla

ss C) light microscope D) electron microscope
Biology
1 answer:
Blizzard [7]3 years ago
7 0
Answer: C) light microscope
You might be interested in
When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferenc
Komok [63]

Answer:

c

Explanation:

Random distribution of the Isopods should be 50/50 in A and B.

Chi-square = \frac{(O - E)^2}{E} where O = observed frequency and E = expected frequency

Chamber         O                    E             Chi-square

  A                   18                   10             \frac{(18 - 10)^2}{10} = 6.4

  B                    2                    10             \frac{(2 - 10)^2}{10} = 6.4

<em>Total Chi-square </em>= 6.4 + 6.4 = 12.8

<em>Degree of freedom</em> = 2 - 1 = 1

<em>Tabulated Chi-square</em> (α = 0.05) = 3.8415

The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.

<em>The correct option is </em><em>c</em><em>.</em>

4 0
3 years ago
Pleeaasee help me its about plants and i dont know how do itttt
aalyn [17]

Petunia = perennial

Fescue grass = perennial

carrots = biennial

sweet corn = annual

tomato = annual

blueberry = perennial

cabbage = biennial

zinnia = annual

sugar maple = ??

blue spruce = annual

ur welcome xx

6 0
3 years ago
Read 2 more answers
Which is composed of amino acids and determines all the structures and functions of organisms?
Mice21 [21]

Answer:

protein

Explanation:

7 0
3 years ago
How can people help keep freshwater resources renewable? A. Avoid drip irrigation systems on farms.
erik [133]

Answer: D. Add water features to private gardens.

Renewable resources are those which can be replenished after one or subsequent uses. Examples include oxygen, fresh water, solar energy and biomass. Adding water features to private gardens can be a mode of replenishing freshwater. A system which can absorb the water which is being supplied to plants in the garden through soil and collect this water as a reservoir in the form of groundwater.

4 0
3 years ago
Read 2 more answers
Students can track individual polar bear movements online. Each bear's
-Dominant- [34]

Global Positioning System (GPS)

5 0
3 years ago
Other questions:
  • Which two factors of a molecule determine whether or not it can cross the membrane? A. Color and weight B. Shape and texture C.
    13·2 answers
  • 100 Points!
    9·1 answer
  • + Create
    12·1 answer
  • This responds to messages from the communication system and changes its level
    12·1 answer
  • Submerging a plant cell in distilled water (100% water) will result in
    14·1 answer
  • According to the phylogenetic tree, which phylum of organisms are most closely related to chordates?
    10·1 answer
  • What would happen to the light independent reactions if you put a plant in a dark closet for many days?
    9·1 answer
  • What wavelength of light is being reflected most in this plant cell?
    15·1 answer
  • N/a pls help me. Asap
    12·1 answer
  • Select the correct answer from each drop-down menu.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!