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3 years ago

Which level on the energy pyramid has the third most energy?

1 answer:

6 0

Primary producers! They get their energy directly from the sun through photosynthesis. All consumers lose some energy from the previous level through indigestible parts, such as plant root (or later bones)

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A dog breeder is looking into purchasing a 3 year old male dog for her business. A breeder online is advertising purebred males

Alex73 [517]

Answer:

The dog breeder to check for all the details that meets her requirement of dogs.

Explanation:

A dog breeding is the practice of mating dogs. In the context, it is given that a dog breeder wants to purchase a male dog of three year old for her business and she founds an advertisement on the net about a purebred males that costs $700. Now before buying this purebred male dog, the dog breeder should first of all check whether the seller who is selling online is a licence breeder or not.

The dog breeder should also check whether the dog is a purebred or not and should also find out the actual age of the dog. The health of the dog should be checked by an professional vet before buying the dog.

7 0

2 years ago

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).

From this cross the expected ratios are:

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>Chi square test</h3>

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

The observed frequencies were:

34 Red
76 Pink
40 White

Total 150

The expected frequencies for our null hypothesis are:

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

Which phase of growth do cells undergo after cell division, leading to primary growth in stems? A. maturation B. differentiation

Leya [2.2K]

C. Elongation I believe :)

3 0

3 years ago

Apple flowers produce seeds inside ovaries, which mature into fruits. Apple trees belong to which of the following?

Tpy6a [65]

The answer is b. Angiosperms. Bryophytes are seedless plants. Gymnosperms and Angiosperms have seeds. The difference between these two groups is in the seed position. If seeds are inside ovaries, a plant belongs to Angiosperms. If seeds are outside ovaries, on the scales for example, a plant belongs to Gymnosperms. Since apple flowers produce seeds inside ovaries, it belongs to Angiosperms.

6 0

2 years ago

Read 2 more answers

What is the person's ultimate search in life? why?

user100 [1]

Answer: The ultimate purpose of life is to be at a higher positive frequency than negative, as you move through the vicissitudes of life, such that you feel content at the moment of death.

Contentment at the moment of death ensures that you reconnect to your positive soul self after death, review soul lessons, heal and recuperate.

If you are not content at the moment if death , you may get lost in an invisible maze of difficulties, as a spirit in a human form and gave a difficult after life & /or next life. .. To be content at the moment of death requires several years of training in detachment, meditation and positive thinking, through life.

Explanation:

8 0

2 years ago