Some animals, like birds, reproduce by fusion of cells.
before a bird hatches, what protects the bird as it develops?

a. the warmth of the sunlight

b. the thin shell of the egg

c. the nutrients from its mother's body

d .the hard shell of the egg

D the hard shell of the egg

Explanation:

took the test

() *0.06

Step-by-step explanation:

Cleo buys x packs of markers, y wide-ruled notebooks, and z college-ruled notebooks.

All spiral-bound notebooks, whether wide-ruled or college-ruled, sell for $1.20 each. This gives expressions : 1.20y and 1.20z

A store sells four-packs of permanent markers in assorted colors for $3.19 per pack. Cleo buys x packs of markers so expression becomes :

(3.19 per pack)

As Cleo buys x packs of markers, y wide-ruled notebooks, and z college-ruled notebooks.

The combined expression becomes:

The store charges a 6% sales tax on Cleo’s total bill. So, expression becomes:

() *0.06