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
BlackZzzverrR [31]
2 years ago
14

Darwin suggested that plants pollinated by long tongued insects would benefit by having long flowers. To measure the advantaged

of having long flowers, Johnson and Steiner (1997) experimentally shortened 68 of 140 flowers. The remaining flowers were control. One week later, 24 out of the 68 shortened flowers had received pollen, whereas 18 out of the control flowers had received pollen. Estimate the odds ratio of not receiving pollen after flower shortening, as compared to control flowers
Biology
1 answer:
lord [1]2 years ago
3 0

Answer:

The possibility of not receiving pollen for shortened flowers is 64.7% and for the control group it is 75%.

Explanation:

Pollination carried out by insects help plants spread their pollens and multiply. Contrary to Darwin's suggestion, the experiment results prove that having long flowers decreases the chances of pollination by long tongued insects as it is shown in the experiment.

The odds ratio of not receiving pollen after the flower shortening can be calculated as 64.7% compared to the odds of flowers that were not shortened which have a possibility of 75% of not receiving pollen.

I hope this answer helps.

You might be interested in
The benefit of measuring the initial rate of a reaction, V0, is that early in the course of the reaction, A) Km is the substrate
aleksandr82 [10.1K]

Answer:

Rate of product formation is linear and [S] has not been lowered significantly.

Explanation:

The rate of enzyme-catalyzed reactions is affected by several factors, the contraction of substrates [S] is one of them. The substrate concentration keeps on changing as the reaction proceeds. This is why the reaction rate is measured at the initial stages of reactions when the substrate concentration [S] is much greater than the concentration of the enzyme. It is called the initial rate or initial velocity.

Under the conditions of higher substrate concentration and relatively much lower enzyme concentrations, only a few molecules of substrates are being converted into product. At a relatively higher substrate concentration, the rate of product formation increases linearly.

4 0
3 years ago
Use the drop-down menus to identify the types of convergent boundaries labeled A, B, And C.
algol [13]
Oceanic-continental convergence occurs when an oceanic plate and a continental plate converge. They are pushed together and the oceanic plate is forced to go under the continental plate. So based on the diagram, this convergence occurred in letter B. 

Oceanic-oceanic convergence occurs when two oceanic plates collide into one another. The oceanic plate that is older, denser and/or colder will be the plate that will go under the other. It will be forced down into the mantle. So in our diagram, this occurs in letter A.

Continental-continental convergence occurs when two continental plates converge. In this case, the plates push up against each other and create mountain ranges. Unlike the other two, they do not sink down, the movement is upwards. This occurs in the area C of your diagram. 

6 0
2 years ago
Read 2 more answers
"One of the two major systems that are affected by the stress response is the ____________, which results in increased productio
MAXImum [283]

Answer:

The correct answer is the endocrine system.

Explanation:

The sympathetic division of the autonomic nervous system and the endocrine system are the two prime systems that take part in the stress response.  

At the time of acute or chronic stress, the endocrine system first makes the hypothalamus to discharge CRH or corticotropin-releasing hormone into the bloodstream. The release of CRH further makes the anterior pituitary to discharge ACTH or adrenocorticotropic hormone into the blood. This further stimulates the adrenal cortex to discharge cortisol, that is, one of the glucocorticoid hormone into the bloodstream.  

The cortisol finally makes the organs and tissues present within the body to effectively cope up with the initial stress stimulus.  

6 0
3 years ago
The ability of water to hold more heat than land keeps the temperature on earth
Anna007 [38]
<span>The ability of water to hold more heat than land keeps the temperature on earth moderate

If the oceans didn't hold large amounts of heat, then the Earth would probably overheat which would cause many problems for all life forms.</span>
4 0
3 years ago
Read 2 more answers
Cell theory teaches that _____.
UNO [17]
The basic unit of life is the cell
4 0
3 years ago
Other questions:
  • Does the prokaryotic celk have organelles (yes, no, or just some)
    6·1 answer
  • Imagine a plant that deposits gibberellins in its seeds. the consequence would be _____.
    9·1 answer
  • Use the passage to answer the following question.
    12·1 answer
  • What is a measurement of the earths history divided into time periods
    8·2 answers
  • In eukaryotes, the first amino acid in a growing polypeptide chain is always _______ because the only codon for this amino acid
    14·1 answer
  • 1. Scientists cannot perform an experiment without first asking questions about the things they observe around them. What was th
    15·1 answer
  • 6. Two pink (Rr) flowers are crossed. (RR=red, rr=white)
    14·2 answers
  • Does the malaria virus start active or hidden?
    13·1 answer
  • Explain how many ancient and medieval societies forwarded marine science even though they were not specifically addressing issue
    9·1 answer
  • What macromolecules and biomolecules are critical for<br> cellular respiration to occur?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!