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Tems11 [23]
3 years ago
14

Define thigmotropism, phototropism, and gravitropism and give an example of each​

Biology
1 answer:
Rufina [12.5K]3 years ago
8 0

Answer:

a) Thigmotropism

b) Phototropism

c) Gravitropism

Explanation:

A) the turning or bending of a plant or other organism in response to a touch stimulus. example:  the folding movement of the Mimosa pudica leaflets, can be considered as an example of thigmonastism.

B) the orientation of a plant or other organism in response to light, either towards the source of light ( positive phototropism ) or away from it ( negative phototropism ).example: Sunflower is a highly phototropic plant. They grow towards the sun and are also seen tracking the movement of the sun throughout the day. That is, the flower keeps changing its direction with the movement of the sun. Sunflower requires more light for its growth and survival.

C) The gravity-directed growth process, called gravitropism, dictates upward shoot growth to ensure a proper positioning of the leaves for efficient photosynthesis and gas exchange. example: tree has fallen over and due to gravitropism exhibits this arched growth.  

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has recently taken up weight lifting and his friends at the gym mistakenly believe they should eat more protein to build muscle.
faltersainse [42]

Complete Question

Ruben Ward has been weight lifting and eating a high protein diet. Below is Ruben's profile and what he ate for a day. He entered his profile information and food intake into Diet & Wellness Plus and then pulled the Diet & Wellness Plus Reports. View Ruben’s Intake vs Goals and Macronutrient Ranges Reports and then answer the questions below. Profile for Ruben Ward 1. Age: 19 years old 2. Gender: Male 3. Height: 5 ft, 8 inches 4. Weight: 205 lbs 5. Non-Smoker 6. Activity Level: Active

Ruben has recently taken up weight lifting, and his friends at the gym mistakenly believe they should eat more protein to build muscle. The DRI for protein for healthy adults is 0.8 g per kg body weight. If Ruben weighs 205 lbs (93 kg), how many grams protein per kg body weight did he eat on this day?

a. 5.37 g/kg

b. 10.33 g/kg

c. 3.55 g/kg

d. 4.88 g/kg

Answer:

c. 3.55g/kg

Explanation:

RDI means Recommended Dietary intake. It is the required amount of a nutrient expected to be taken by an individual for optimal health.

The Recommended Dietary Intake I'd protein falls withing the range of 0.8 grams per kg to 1.8 grams per kg

For Reuben

He weighs 93 kg

If Reuben consumed 330 grams of protein, his grams of protein per kg body weight is

330 grams ÷ 93kg

= 3.55g/kg.

4 0
3 years ago
Designing an Experiment
padilas [110]
<h3>Answers:  the plant under the uv light for eight hours is  <u><em>experimental group </em></u></h3><h3>The amount of water that is given to all of the plants is</h3><h3><u><em>controlled variable </em></u></h3><h3><u><em></em></u></h3><h3>The plants that are under the light for six hours</h3>

<u><em>control group</em></u>

<u><em></em></u>

4 0
3 years ago
A farmer plants Bt cotton that is genetically modified to produce its own insecticide. Of the cotton bollworms feeding on these
-Dominant- [34]

Answer:

the frequency of the resistant allele after one generation is 0.989

Explanation:

Given that :

A farmer plants Bt cotton that is genetically modified to produce its own insecticide.

Of the cotton bollworms feeding on these Bt plants, only 5% survive

i.e the survival rate s  = 5% =0.05

unless they have at least one copy of the dominant resistance allele R that confers resistance to the Bt insecticide

Frequency of R allele = 0.01

In order to determine what will the frequency of the resistance allele be after one generation of cotton bollworms fed on Bt cotton; we need to first determine the frequency of the recessive allele r.

According to Hardy-Weinberg Equilibrium ;

p+q = 1

Let p = R and q = r

R + r = 1

0.01 + r = 1

r = 1 - 0.01

r = 0.99

Now; the  frequency of the resistance allele after one generation can be calculated as :

q' = \dfrac{q(1-sq)}{1-(sq^2)}

where ;

q' = R

q = r

q' = \dfrac{0.99(1-(0.05 \times 0.99))}{1-(0.05 \times 0.99^2)}

q' = \dfrac{0.99(0.9505)}{1-(0.049005)}

q' = \dfrac{0.940995}{0.950995}

q' = 0.989

Thus; the frequency of the resistant allele after one generation is 0.989

3 0
3 years ago
.. Indicate:<br>2.1 The location of bicuspid valve.<br>2.2 The function of bicuspid valve.​
charle [14.2K]

Answer:

2.1 located between the left atrium and the left ventricle (left atrioventricular orifice).

2.2 it helps to prevent blood from flowing backward as it moves through the heart.

8 0
3 years ago
What does an egg contribute to the embryo that a sperm does not contribute?
fenix001 [56]
<h3><u> Answer;</u></h3>

B. organelles

<h3><u>Explanation;</u></h3>
  • Eggs contribute 50% of the chromosomes as well as cytoplasm and cellular mechanisms required for the cell to thrive and replicate.
  • Mitochondria for example are particularly important to the embryo but are only passed from mother to child via the egg.
  • Sperms on the other hand, are just packets of DNA.
5 0
3 years ago
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