What is a batholith ? In what modern tectonic setting are batholiths being generated ?

a. A mouse cross

$A / a \cdot B / b \times a / a \cdot b / b$

made, and in the progeny there are

$25 \% \mathrm { A } / a \cdot B / b , 25 \% \mathrm { a } / \mathrm { a } \cdot b / b$

$25 \% \mathrm { A } / \mathrm { a } \cdot b / b , 25 \% \mathrm { a } / \mathrm { a } \cdot \mathrm { B } / \mathrm { b }$

Explain these proportions with the aid of simplified meiosis diagrams. b. A mouse cross

$\mathrm { C } / c \cdot D / d \times c / c \cdot d / d$

is made, and in the progeny there are

$45 \% C / c \cdot d / d , 45 \% c / c \cdot D / d$

$5 \% c / c \cdot d / d , 5 \% C / c \cdot D / d$

Explain these proportions with the aid of simplified meiosis diagrams.

Briefly explain the formation of urine.

A slow jogger runs a mile in $13 \mathrm{~min}$. Calculate the speed in:

(a) in/s,

(b) $\mathrm{m} / \mathrm{min}$,

(c) $\mathrm{km} / \mathrm{h}$ (1 mi $=1609 \mathrm{~m}$; 1 in $=2.54 \mathrm{~cm}$ ).