Which of the following is a mode of nutrition?

From where do living organisms primarily obtain energy?

Gross calorific value and physiological value of proteins are $X$ and $Y$ $kcal/g$ respectively.

$A$ balanced diet should have approximately

Which of the following symptoms are common to both Marasmus and Kwashiorkor?
$I-$ Muscle wasting
$II-$ Fat stored under the skin
$III-$ Thinning of limbs
$IV-$ Failure of growth and brain development
$V-$ Severe edema (swelling) in the body

The deficiency of vitamin $B_{1}$ causes