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4 years ago

Blank will develop pharyngeal arches. blank will develop a postanal tail in the embryonic stage

Biology

2 answers:

Mashutka [201]4 years ago

6 0

Answer: 1. barb fish 2. newts

The pharyngeal arches are the structures which are precursors of embryonic development in the vertebrates. In the fishes, gill arches or branchial arches mimicking the phyrangeal arches . Among the option given, the barb fish is the relevant option for the first blank.

This type of tail development is the characteristic property of the chordates. Among the options given, the newts is the relevant one as these are chordates.

Sedaia [141]4 years ago

5 0

First blank is barb fish
And the second blank is newts

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Why do scientist divide the earth into to layers

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3 years ago

Which vitamin can be synthesized in significant amounts by humans and, therefore, may NOT be essential

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Answer:

The correct ansqwer is- Vitamin D

Explanation:

Vitamin D is the vitamin that can be synthesized by the human body itself therefore it is not an essential vitamin for human beings. Human skin is the part that helps in making this vitamin in humans.

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3 years ago

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

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4 years ago

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