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2 years ago

Put the following steps for urine formation in order from first (step 1) to last (step 4).

Biology

1 answer:

olchik [2.2K]2 years ago

7 0

Answer:

Filtrate travels down the nephron tubule - Step 2

Blood is filtered in the glomerulus and captured in Bowman’s capsule -Step 1

Urine is collected in vessels and leaves the kidneys - Step 4

Beneficial molecules and water are reabsorbed into the blood - Step 3

Explanation:

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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.

6 0

3 years ago

True or false: The parachute on a dandelion seed makes it easily transported by animals.

Marat540 [252]

Answer:

False

Explanation:

The parachute on a dandelion makes it easily transportable by AIR.

The parachute helps in creating air resistance, and helps the dandelion to glide through the air. The presence of the parachute also plays an important role in the dispersion of its seeds.

8 0

2 years ago

Why is it commonly believed that carbon dioxide is responsible for global warming? Select 2 options.

NikAS [45]

Answer:

it is a greenhouse gas witch traps heat

and it dissolves in the ocean causing fish to die and decompose creating more greenhouse gas

Explanation:

5 0

2 years ago

How is an invasive species introduced to a new ecosystem?

sergejj [24]

Via transacution , this means replacement of usual

3 0

3 years ago

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The ________ is the idea or concept that ancient life forms succeeded each other in a definite, evolutionary pattern and that th

exis [7]

The answer is D. In a geological era, when the plants and animals in the then environment die, they get buried in sediments. These sediments are covered by other sediments of another geological time within which are the remains of dead species of the then geological era. These sediments from different geological times have different properties hence form visible strata that can be studied to identify the kind of environment in the then geological time. Their fossils can also be studied to identify the kind of species that roamed the earth during the time.

3 0

3 years ago