Parts of some plants and animals grow according to the fibonacci sequence of numbers, developed by an italian mathematician, in which each number is the sum of the previous two numbers. the shell of the chambered nautilus, the seeds in a sunflower, and pineapples all exhibit a structure called the "fibonacci spiral". look at the pictures. which crosscutting concept of biology do these phenomena best represent?

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.