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
MatroZZZ [7]
2 years ago
12

One effect of the pesticide ddt upon birds is to inhibit the production of the enzyme carbonic anhydrase, which controls calcium

metabolism. it is believed that this causes eggshells to be thinner and weaker than normal and makes the eggs more prone to breakage. an experiment was conducted where 16 sparrow hawks were fed a mixture of 3 ppm dieldrin and 15 ppm ddt (a combination often found in contaminated prey). the first egg laid by each bird was measured, and the mean shell thickness was found to be 0.19 mm. a "normal" eggshell has a mean thickness of 0.2 mm. the null and alternative hypotheses are
Biology
1 answer:
pav-90 [236]2 years ago
7 0

<u>Answer</u>:

The null hypothesis: the mean egg thickness is 0.2 mm H_{0} =0.2

The alternative hypothesis: the mean egg thickness is less than 0.2 mm H_{1}

In statistics, the null hypothesis states that there is no significant difference between the observed value and the mean thickness. The alternative hypothesis states is the opposite and states the scientist's "idea" behind the experiment. Here, it refers to the fact that due to DDT, the egg shell will be thinner compared to the mean value.

You might be interested in
Water can act as either a(n) _____ or a _____. acid, base solute, solvent anion, cation salt, mixture
IgorC [24]
Water can act as either a base or an acid. Water acts as an acid by donating a hydrogen ion when it reacts with a stronger base such as sodium hydroxide. Water may also act as a base when it accepts hydrogen ion when reacting with a strong acid such as hydrochloric acid. This is based on Bronsted concept and definition of a base ( proton acceptor) and acid (proton donor). Such a  compound that can act as a base and as an acid is called an amphiprotic molecule.
8 0
3 years ago
1. ¿Crees que hay algún elemento de tu cuerpo que no cambie durante toda tu vida? O, todo cambia
VMariaS [17]

Answer:

si todo cambia porsue le encanta el cambio

4 0
2 years ago
What does the energy pyramid demonstrate? A. A great amount of energy is gained moving up the energy pyramid. B. A great amount
Crazy boy [7]

The answer should be B

4 0
2 years ago
Read 2 more answers
DNA is made of chains of four smaller molecules called:
allsm [11]

Answer:

The answer A.nucleotides

Explanation:

3 0
3 years ago
A patient suffers from a chronic illness. the nurse recognizes which characteristics of a chronic illness? select all that apply
Taya2010 [7]
1, 3, 5
<span>The characteristic of a chronic illness is that it leaves a patient with a permanent disability which can be physical or mental. This disability affects the day-to-day life activities of the patient, preventing the patient from performing activities of daily life. The patient may need family support for performing daily activities. In an acute illness, the patient returns to a fully functional life after treatment; in chronic illness the patient may not be able to resume a normal life. The treatment is more effective in acute illness; patients with chronic illnesses are less likely to respond to treatments in later stages.</span>
6 0
3 years ago
Other questions:
  • . A failure of the red-sensitive nerves in the eye to respond to light properly causes
    14·2 answers
  • which statement is true about gold and helium? a. they are both made of subatomic particles. b. one of made of protons and the o
    13·2 answers
  • Which statement represents the definition of a reversion (reverse mutation)?
    9·2 answers
  • If the concentration of salt in the fluid surrounding cells decreases and the concentration of other solutes remains constant?
    10·1 answer
  • Which condition is necessary for water droplets to condense and form clouds? dry air ice crystals in air tiny particles in air r
    6·2 answers
  • Consider the formula for glucose: C6H12O6. What does this indicate about the relationship of the reactants to glucose? Twelve wa
    14·2 answers
  • Which type of reproduction results in<br> a greater variety of offspring?
    14·1 answer
  • The element can be identified through its
    15·1 answer
  • How might a clogged blood vessel affect the nervous system’s and the endocrine system’s abilities to deliver signals?
    8·1 answer
  • Pls help it urgent. I’m clueless
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!