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3 years ago

When and where was the possibility of growing thornless varieties of plants discovered?

1 answer:

7 0

The discovery of thornless plants was made around the turn of the 20th century. To name one such thornless plant, particularly, the Blackberry plant, the deviation from the thorned blackberry canes were discovered in the United States. Since then, several different thornless blackberry varieties have been cultivated for fruit gardens.

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A daughter cell that matures to the inside of the vascular cambium becomes ______, and a daughter cell that matures to the outsi

melomori [17]

A daughter cell that matures to the inside of the vascular cambium becomes secondary xylem and a daughter cell that matures to the outside of the vascular cambium becomes secondary phloem.

The cambium divides its cells to create secondary xylem and phloem. As secondary phloem and xylem tissue builds up, the stem becomes thicker and develops wood and bark.

The kind of xylem produced by secondary growth is known as secondary xylem. In contrast, during primary growth, the primary xylem develops.
As a result, lateral growth, as opposed to vertical growth, is connected with the secondary xylem, as opposed to the primary xylem.
The procambium, which is found between the xylem axis and the phloem pole, develops into the cambium in the root.
A pattern resembling the arrangement of secondary stem is produced when xylem forms in the core and phloem on the perimeter of secondary development.

learn more about vascular cambium here: brainly.com/question/859907

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5 0

2 years ago

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Use the Harris-Benedict equation to estimate your calorie needs. Show your calculations to explain how you arrived at your answe

Ratling [72]

Answer:

The Harris Benedict Equation is a formula that determines the total daily energy expenditure (calories) using BMR with some activity factors.

Basal Metabolic Rate (BMR) is defined as the amount of calories one would burn without doing anything for 24 hours. It uses variables of weight, age, height and gender to calculate BMR.

BMR calculation = 447.593 + (9.247 x weight in kg) + (3.098 x height in cm) - (4.330 x age in years)

In Harris Benedict Equation, BMR is multiplied by activity factor to determine calories need.

The activity factors in Harris Benedict Equation are:

for no exercise = 1.2

exercise for 1 to 3 days/week or light exercise = 1.375

exercise for 3-5 days/week or moderate exercise = 1.55

exercise for 6-7 days a week or hard exercise = 1.725

exercise for 2 times training = 1.9

So, calculation for my calorie needs is as following:

BMR = 447.593 + (9.247 x 50 kg) + (3.098 x 164.592 cm) - (4.330 x 23 in years) = 974.945

Calorie needs = BMR x 1.55

= 974.945 x 1.55

= 1511.16 calories

6 0

3 years ago

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Is acid rain causing a decline of frog population? (variables/scientific method)

Oksi-84 [34.3K]

Yes. Acid rain destroys frog’s and tadpoles’ (young frogs) habitat of lakes and depletes oxygen supply in the lakes.

6 0

2 years ago

Which plate is moving below the Pacific plate?

KiRa [710]

Answer:

The Pacific Plate is moving to the northwest at a speed of between 7 and 11 centimeters (cm) or ~3-4 inches a year. The North American plate is moving to the west-southwest at about 2.3 cm (~1 inch) per year driven by the spreading center that created the Atlantic Ocean, the Mid Atlantic Ridge.

Explanation:hope it works for you:)

8 0

3 years ago

What determines the chemical properties and physical properties of a mineral?

maw [93]

Answer: It's A.

Explanation: Simple I took the test and he didn't or he just want you to fail I don't so vote me brainliest.

7 0

3 years ago

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