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
Levart [38]
3 years ago
7

A group of students designed an experiment to determine the effect of compost on the germination and growth of plants. The stude

nts set up experimental plots by mixing different ratios of soil and compost. They planted 20 pea and 20 melon seeds in each plot and watered each plot regularly. The students recorded the number of seeds that germinated, and as the plants grew, they recorded plant length, number and size of leaves, and general health observations. The following observations were recorded. In all treatments, more pea seeds germinated than melon seeds. There was a week of rainy weather at three weeks. Melon plants developed a fungal growth at four weeks. Melon plants grew longer than pea plants, but many melon leaves showed signs of yellowing as the weeks passed. The students concluded that pea plants grew better in compost than did melon plants. Which of the following best addresses the validity of the conclusion made by the students?
(A) The conclusion is valid because the independent and dependent variables in experiment were controlled.
(B) The conclusion is valid because the experimental design included in a large sample size.
(C) The conclusion is invalid because other variables in the experiment (both biotic and abiotic) affected the results.
. (D) The conclusion is invalid because the units of measurments were not given in experimental design.
Biology
1 answer:
pshichka [43]3 years ago
3 0

Answer: (A) The conclusion is valid because the independent and dependent variables in experiment were controlled.

Explanation: There are some basics requirements in order for an experiment to be valid: hypothesis, monitoring, independent and dependent variables and constants.

You might be interested in
Each cell has a structure that separates the inside of the cell from.the environment. What cell is this?
kotykmax [81]

Answer:

Either the cell wall or the cell membrane.

Explanation:

All cells have cell membranes which line the outside of the cell, and some cells have cell walls, which also line the outside of the cell. Since all cells have cell membranes I am inclined to believe that the correct answer would be cell membranes.

8 0
3 years ago
Which animals are ectothermic? turtles and lizards birds and mammals frogs and mammals lizards and birds?
PilotLPTM [1.2K]
Ectothermic animals are cold blooded animals, or fishes, amphibians, reptiles, and invertebrates. So the right answer would be turtles and lizards. If the answer choices was supposed to look like this
turtles and lizards
birds and mammals
frogs and mammals
lizards and birds
It would be the first option.
Hope this helps!
4 0
3 years ago
Read 2 more answers
What is the primary function of decomposers within an ecosystem?
MAVERICK [17]
The primary function of decomposers...Decompose
3 0
3 years ago
Read 2 more answers
The Hubble Telescope: has a 1,000 foot dish is the largest radio telescope in the world can receive near-infrared and ultraviole
Eduardwww [97]
<span>The answer is the Hubble telescope Can receive near-infrared ultraviolet wavelengths.</span>
7 0
3 years ago
Read 2 more answers
Which of the following best describes the relationship between the structure of the cell membrane and it's function
Sergeeva-Olga [200]
The cell membrane folds upon itself easily, which facilitates cellular reproduction by mitosis. 

<span>The membrane is a flexible, fluid mosaic and changes shape easily to create holes for substances to move in and out of the cell. </span>

<span>The outer layer of the membrane is hydrophilic, which allows water to flow in and out of the cell easily to eliminate waste. </span>

<span>The proteins that are embedded in the cell membrane act as channels to transport substances in and out of the cell.</span>
3 0
3 years ago
Other questions:
  • The rectal route is preferred over the oral route for certain emergency medications because:
    14·1 answer
  • The simplicity of prokaryotic cells prevents them from
    11·2 answers
  • How is genetic information "read" from mRNA?
    7·1 answer
  • What do many animals use for transport
    7·1 answer
  • The plasma membrane(cell membrane)is made up of a(n)
    15·1 answer
  • which of the following circumstances could be a cause of a miscarriage? a. maternal hormone balance b. genetic normality c. mate
    9·1 answer
  • Explain the cell cycle and phases
    6·1 answer
  • Which of the following are the oldest remnants from the formation of the
    5·1 answer
  • Why are arteries thick walled while veins are thick walled
    11·2 answers
  • Find 4 digit code escape room
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!