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
Tanzania [10]
3 years ago
13

A researcher is interested in the effects of nitrate and phosphate on plant growth and sets up an experiment in which groups of

five plants are given 1, 2, and 3 grams of nitrate and 1, 2, and 3 grams of phosphate in all combinations over a period of one month. The researcher measures plant height and weight at the end of the experiment. What is missing in this experimental design?
Question 9 options:

a control

an independent variable

a dependent variable

a constant
Biology
1 answer:
uysha [10]3 years ago
6 0

Answer:

an independent variable

Explanation:

You might be interested in
How does a plant get the nitrogen from the soil?
elena55 [62]

Answer:

its roots

Explanation:

7 0
3 years ago
What is the advantage to the sphinx moth Xanthopan morgani by having an 8-inch long tongue?
balandron [24]

Answer:

The correct answer would be : option E.

Explanation:

Sphinx moth Xanthopan morganai is montypic genus of sphinx moth which has only one species which gives it as a name of morgan's sphinx moth found in east Africa and Madagascar.

This species of moth have a 8 inch long tongue which is characteristic feature of the species. The 8 inch long tongue gives them advantage in reaching to the nectar where no other pollinator can reach to their.

Thus, The correct answer would be : option E.

7 0
3 years ago
How can food handlers reduce bacteria to safe levels when preparing vegetables
QveST [7]

These can be done by <u>washing</u> of the vegetables, good kitchen <u>Hygiene</u> and<u> proper storage.</u>

Vegetables are perishables, with some quantity of stored water  and therefore they harbor bacteria.

  • Hands should be washed before handling to prevent contamination.
  • Thorough washing should be done under  running water to remove the bacteria. The water current sweeps away the bacteria.
  • Further washing of the vegetables in the warm water with 2% saline solution is needed to  kill some other bacteria and pesticides  resistant to cold water. This is also remove  pesticides residue  on the leave surfaces.
  • The vegetables should be stored in the refrigerator to slow down the activity of the  bacteria  prior to cooking  or before eating.

for more on handling  of  handling of vegetables to remove bacteria; brainly.com/question/4179837

7 0
3 years ago
Guys pls answer this question for me pls
vagabundo [1.1K]

Answer:

pouring a layer of oil in water

Explanation:

hope this helps you

6 0
3 years ago
Read 2 more answers
The reduction in the number of chromosomes to half the normal count occurs during:____.
Xelga [282]

"The reduction in the number of chromosomes to half the normal count occurs during meiosis."

Meiosis is a type of cell division that results in the production of four gamete cells. To develop egg and sperm cells for sexual reproduction, this process is necessary. This division occurs in sexually reproducing organisms.

During meiosis, four haploid cells with one copy of each chromosome are produced after two rounds of division. The genetic material from the maternal and paternal copies of each chromosome is combined to produce new combinations. Following this, during fertilization, the haploid cells (made by a male and a female) fuse to form a cell with two copies of each chromosome, referred to as a zygote.

To learn more about meiosis and chromosomes here,

brainly.com/question/22500583

#SPJ4

8 0
2 years ago
Other questions:
  • How do humans raise the odds that their children will survive to reproduce???
    8·1 answer
  • The act of keeping constant environment
    11·2 answers
  • Sickle-cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cel
    5·1 answer
  • What is the hazy layer that surrounds a comet's nucleus?
    12·1 answer
  • PLEASE HELP! WILL MARK BRAINLIEST IF CORRECT/AVAILABLE!
    15·2 answers
  • A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups
    13·1 answer
  • Name five elements other than carbon that are found in organic compounds
    12·1 answer
  • Pls answer my question and explain. Thanks in advance.
    12·1 answer
  • HELLO
    9·1 answer
  • How are the electron transport chains in photosynthesis and cellular respiration
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!