Order these events from oldest (1) to most recent (4).


1
Dense melted material sank to form the core.


2
Earth’s gravity captured gases to form the first atmosphere.


1
Dust, rock, and ice were pulled together by gravity.


Less dense material cooled, hardened, and formed the crust.

Option A : the fern transitined from gametophyte generation to sporophyte generation.

Answer:

Effective food supply was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II.

One parrot species that feeds on large seeds nests is in the same tree as a parakeet that feeds on small seeds, they occupy different niches.

Explanation: with a great tolerance to a wide range of conditions the species would adapt and thrive which would allow it to reproduce and have all it needs to survive, grow, and take over.

A spring is a natural discharge point of subterranean water at the surface of the ground or directly into the bed of a stream, lake, or sea. Water that emerges at the surface without a perceptible current is called a seep. Wells are holes excavated to bring water and other underground fluids to the surface.

The image shows a cross-section of land scape.

Answer : 900 kg pumpkins

Need this store of protein: 

The seed consists of three components: embryo, endosperm (sometimes perisperm), and seed-coat. Both endosperm and embryo are the products of double fertilization, whereas the seed-coat develops from the maternal, ovular tissues. The seed habit is a significant advancement in the evolution of higher plants.

Anatomy of seed :-

Seed storage proteins provide a source of amino acids and reduced N necessary for germination and early growth of the seedling.

The maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell.

D).increasing the pH with in the cell.

Explaination:

The nerves and muscles communicated with each other to trigger her reflexive response…

The processes of conduction, convection and radiation help distribute energy on earth...