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3 years ago

A lion eats a zebra is an example of which characteristic of life

Biology

2 answers:

SOVA2 [1]3 years ago

4 0

This is a example of preditor and prey the circle of life

maksim [4K]3 years ago

4 0

You forgot the multiple choice( i had this for homework so i know)
a.) having cells b.)responding to its environment c.) using energy d.) growing and developing
The answer would be C:A lion eating a zebra is an example of using energy

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The Offspring produced by a cross between two given types of plants can be any of the three genotypes denoted by A, B, and C. A

ratelena [41]

Complete question:

The offspring produced between two given types of plants can be any of the three genotypes, denoted by A, B and C. A theoretical model of gene inheritance suggests that the offspring of types A, B and C should be in a 1:2:1 ratio (meaning 25% A, 50% B, and 25% C). For experimental verification, 100 plants are bred by crossing the two given types. Their genetic classifications are recorded in the table below.

Genotype Observed frequency

A → 18 individuals

B → 55 individuals

C → 27 individuals

Do these contradict the genetic model?

Use a 0.05 level of significance.

Determine the chi-square test statistic.

Answer:

Do these contradict the genetic model? No, according to the chi-square test, there is not enough evidence to reject the null hypothesis of the population being in equilibrium.

Explanation:

Available data:

Crossed genotypes: two
Genotypes among the offspring; Three → A, B, and C
Expected phenotypic ratio → 1:2:1
Total number of individuals, N = 100
A = 18 individuals
B = 55 individuals
C = 27 individuals

So, let us first state the hypothesis:

H₀= the population is equilibrium for this locus → F(A) = 25%, F(B) = 50%, F(C) = 25%
H₁ = the population is not in equilibrium

Now, let us calculate the number of expected individuals, according to their expected ratio.

4 -------------- 100% -------------100 individuals

1 --------------- 25% -------------X = 25 individuals A

2 -------------- 50% -------------X = 50 individuals B

1----------------- 25%--------------X = 25 individuals C

A B C

Observed 18 55 27
Expected 25 50 25
(Obs-Exp)²/Exp 1.96 0.5 0.16

(Obs-Exp)²/Exp

A) (18 - 25)²/25 = 49/25 = 1.96

B) (55 - 50)² / 50 = 25/50 = 0.5

C) (27 - 25)²/25 = 4/25 = 0.16

Chi square = X² = Σ(Obs-Exp)²/Exp

∑ is the sum of the terms
O are the Observed individuals: 2 in chamber B, and 18 in chamber A.
E are the Expected individuals: 10 in each chamber

X² = ∑ ((O-E)²/E) = 1.96 + 0.5 + 0.16 = 2.62

Freedom degrees = 2

Significance level, 5% = 0.05

Table value/Critical value = 5.99

X² < Critical value

2.62 < 5.99

These results suggest that there is not enough evidence to reject the null hypothesis. We can assume that the locus under study in this population is in equilibrium H-W.

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3 years ago

Murljashka [212]

Answer:

Explanation:

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3 years ago

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ASAP PLEASE I NEED THIS WITHIN 25 Minutes!!! Carefully review the image. Based on this food web, fill in a trophic-level ecologi

loris [4]

Answer:

Its been past 25 min

Explanation:

sorry I couldn't get to it fast enough

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2 years ago

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Some scientists have been concluded that the legs of modern land vertebrates evolved from the fins of ancient fish. What most li

kolezko [41]

Answer:

1- study the fossils of ancient land vertebrates

Explanation:

Some scientists concluded after performing a number of experiments that the legs of modern land vertebrates evolved from the fins of ancient fish. With the passage of time evolution occurs within the body of organisms. These changes occurs due to the surrounding environmental condition of that organism. When the organisms live in water, fins were present but when they go to the land so these fins change into legs. This type of evidence is provided by the scientist after studying the remains of ancient land vertebrates.

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3 years ago

Hydrothermal vents deep in the ocean release extremely hot water, methane gas, and sulfur. Extreme bacteria thrive in this hosti

Reil [10]

Answer:

The organisms in that habitat including the extreme bacteria, will gradually decline

Explanation:

According to the question, an extreme bacteria lives and thrives in an hydrothermal vent where extremely hot water, methane gas, and sulfur are released. The hydrothermal vent located deep in the ocean is the habitat of the bacteria, and considering the fact that it thrives there means it is better adapted to do well in such extreme environment using the sulfur and methane gas produced by the vent for its development.

If the hydrothermal vent becomes inactive i.e. no production of sulfur and methane, and cold, the extreme bacteria might not survive as the conditions required for its optimal functioning are no longer met. The bacteria also makes up the base of the food web in that habitat (constituting organisms like mussels, tube works), meaning that, it begins the feeding chain in that habitat. Hence, a decline in the number of the bacteria will result in a decline in the number of other organisms dependent on the bacteria as energy source (food).

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3 years ago