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
Rufina [12.5K]
3 years ago
6

Which actions help prevent groundwater erosion? Check all that apply.

Biology
1 answer:
KATRIN_1 [288]3 years ago
5 0

Answer:packing down soil

Explanation:

You might be interested in
Brown eye color in fruit flies is caused by a variation in a gene. What are two possible sources of this genetic variation?
sattari [20]

Answer:

random mating

<h3>matution:a change in the chromosomes or genes of a cell</h3>

Explanation:

crossing over(or recombination) between chromotids or homologous chromosomes during meiosis

6 0
2 years ago
I REALLY NEED HELP I WOULD APPRECIATE IT
zaharov [31]

Answer:

D

Explanation:

D is right because the removal of trees and other types of vegetation reduces available food, shelter, and breeding habitat.

3 0
3 years ago
Nana has a water purifier that filters \dfrac13 3 1 ​ start fraction, 1, divided by, 3, end fraction of the contaminants each ho
Sophie [7]

Answer:

Your answer is 1/2 times 2/3 to the power of t.

Explanation:

8 0
3 years ago
Read 2 more answers
When pink sweet peas were self-pollinated and the seeds were collected and sown, the following flower colors were obtained: Red
Pavlova-9 [17]

Answer:

c. 1:2:1

The results are consistent with incomplete dominance for this trait, with pink flowers being heterozygous.

Explanation:

If flower color were determined by a gene showing incomplete dominance, the possible genotypes and phenotypes are as follows:

  • RR- red
  • ww - white
  • Rw - pink

If pink sweet peas are self-pollinated, then a cross between two heterozygous individuals is done (Rw x Rw).

<u>From this cross the expected ratios are:</u>

  • 1/4 RR (red)
  • 2/4 Rw (pink)
  • 1/4 ww (white)

So the null hypothesis is that the observed results exhibit a 1:2:1 ratio.

<h3><u>Chi square test</u></h3>

X^{2} = \sum \frac{(Observed - Expected)^2}{Expected}

<u>The observed frequencies were:</u>

  • 34 Red
  • 76 Pink
  • 40 White

Total 150

<u>The expected frequencies for our null hypothesis are:</u>

  • 1/4 x 150 = 37.5 Red
  • 2/4 x 150 = 75 Pink
  • 1/4 x 150 = 37.5 white

X^{2} = \frac{(34- 37.5)^2}{37.5} + \frac{(76- 75)^2}{75} + \frac{(40- 37.5)^2}{37.5}

X^2=0.5067

The degrees of freedom (DF) are calculated as number of phenotypes - 1; in this case DF = 3-1 = 2.

If we look at the Chi square table, for 2 DF and a probability of p0.05, the critical value is 5.991

Our X^2 value of 0.5067 is less than the critical value, so we do not reject the null hypothesis. The results are consistent with incomplete dominance for this trait, with pink flowers being heterozygous.

8 0
3 years ago
Some plants require water, light, minerals, oxygen, and carbon dioxide to survive. These are examples of __________ that plants
zaharov [31]
What he said was right man

Mark me Brainlyist tho it would make my night
4 0
3 years ago
Other questions:
  • Dissociation is quite common and presents in various forms of temporary distraction or separation. When the separation becomes s
    12·1 answer
  • Identify the stages of the water cycle where water moves downward from the force of gravity.
    5·2 answers
  • In texas, the legal definition of intoxication is: not having the normal use of mental or physical faculties by reason of the in
    13·1 answer
  • During replication when there's one old old stand of DNA, is called?
    10·1 answer
  • in dogs there is a hereditary type of deafness caused by a recessive gene. Two dogs who carry the gene for deafness but have nor
    13·1 answer
  • 9. Your boss at Wendy's says you will receive a raise if you sell over 60% of the fries that are in the cooler. There are 230 po
    13·1 answer
  • Is the following statement true or false? “Malaria caused the sickle cell allele to appear.” Justify your answer in one or two s
    9·1 answer
  • 21. Which of the following is not a feature of echinoderms? tube feet body segments radial symmetry endoskeleton
    5·2 answers
  • In an Antarctic ecosystem, phytoplankton are eaten by krill, which are eaten by baleen whales. If the population of phytoplankto
    5·2 answers
  • Which of the following best describes a eukaryotic cell?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!