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marysya [2.9K]
2 years ago
7

QUICKKKKKK PLEASE HELP!!

Biology
2 answers:
den301095 [7]2 years ago
7 0

Answer:

hi

Explanation:

photo

nika2105 [10]2 years ago
7 0

Answer:

Explanation:

Photosynthesis:

-Takes place in the chloroplast (in plants)

<u>-6CO2 + 6H2O → C6H12O6 + 6O2.</u>

-Anabolic reaction

-Happens in plants and some bacteria and protists

Cellular Respiration:

-Takes place in the mitochondria (aerobic - with oxygen) and in the cytosplasm (anaerobic - without oxygen)

<u>-C6H12O6 + 6O2 → 6CO2 + 6H20 + energy</u>

-Catabolic reaction

-Happens in all cells

Similarities

- Both need water

- ATP synthesis

- Electron transport chain

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Which keystone species feed on other animals and prevent them from damaging the ecosystem?
Naddika [18.5K]

D.  Predators

Predators keep populations of other species in check.  This was pretty clearly demonstrated in Yellowstone National Park after the wolves were eradicated there.  The deer populations increased to the point that the aspen trees nearly disappeared due to the saplings' being eaten by deer.  Since the reintroduction of wolves to the park, the aspen trees have begun to flourish once again.

5 0
3 years ago
Tumors secrete chemical signals that cause blood vessels from the circulatory system to grow into the tumor, providing nutrients
mario62 [17]
The answer is D.Angiogenesis

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3 0
3 years ago
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.

<em><u>Genotype       Observed frequency</u></em>

    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:

<u>Available data</u>:

  • 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

<u>                                                   A                             B                           C</u>

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

<u>(Obs-Exp)²/Exp</u>

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    

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

 

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3 years ago
¿Qué tipo de célula apareció primero en la Tierra?:___, y se presentan en seres vivos como las:___ y se caracterizan porque:___.
Levart [38]

Answer:

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Explicación:

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A cell pumps hormones out into the bloodstream; a process that requires energy. If 4 ATP were converted to ADP, how much energy
dedylja [7]

It is 122KJ of energy is used from the conversion of ATP to ADP because hydrolyses of 1 mole of ATP requires 30.5KJ of energy. Therefore, if 4 ATP is hydrolyses, it will be 4× 30.5=122KJ. ... This energy is given out because there is cleavage of high energy phosphate bond in ATP while converting it into ADP.

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3 years ago
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