What is the defining abiotic factor of deserts?

1 answer:

6 0

The defining abiotic factor of deserts is the amount of rainfall which is relatively very little in deserts. Desert climates can be found almost everywhere in the world.

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According to the big bang theory, how did the universe begin? what had to happen before atoms could form?

hammer [34]

According to the Big Bang Theory, the universe began when an explosion had occurred 15 billlion years ago. It consist of an explosion of space within itself. Unlike an explosion of bomb where fragments are thrown upward in the theory it was an exact opposite. Atoms formed when the matter and anti-matter were formed together after it has cooled down.

6 0

4 years ago

Read 2 more answers

1. Spongy bone is different from compact bone because spongy bone a. Is composed of numerous osteons b. Contains osteons all ali

Romashka [77]

Answer:

Is composed of trabeculae that are oriented along lines of stress. (Ans. D)

Explanation:

Spongy bones are also known as trabecular and cancellous bones. It is covered by compact bones and present in the long bones. They are known as spongy because they are highly vascular and porous tissues.

Osteoblast thin area creating the turbeculae space between the tissues. Spongy bones are also known for home of hematopoietic stem cells and bone marrow, which are helping to differentiate white blood cells, red blood cells, and platelets.

Some difference between spongy bone and compact bone are:

1) Spongy bones are light weight and compact bones are heavy.

2) Spongy bones are composed of trabeculae and compact bones are composed of osteons.

3) Spongy bones are known as cancellous and compact bones are known as cortical bones.

4 0

4 years ago

Which of the following phylogenetic trees best represents this data?

Bess [88]

Phylogenetic trees are tree-like graphic representation that show the evolutive relationship between different taxa.

<h3>What is a phylogenetic tree?</h3>

A phylogenetic tree is a graphic representation of the evolutive relationship between different taxa.

This representation has a tree-like shape.

The phylogenetic tree expresses how far or close are in evolutive history the different groups.

<h3>Structure of the phylogenetic tree</h3>

The phylogenetic tree is composed of,

Lineages → The taxonomic groups of interest. These are placed in the extremes of the branches.

Nodes → These are the ramification points, which are also known as divergence points. They represent the location of the most recent common ancestor.

Root → This is the oldest common ancestor that all lineages share. The first one in the tree.

⇒ Highly related groups that share a recent common ancestor. This means that they all diverge from the same node.

⇒ Lineages less related to each other are those whose common ancestor is far away in history.

In a phylogenetic tree, the most distant group receives the name of outgroup.

It shares no traits or characters with the lineages of interest that compose the ingroup.

You can compare the outgroup with the ingroup to determine the evolutive relationship and which characters are primitive or derived.

Since I do not have further information, I will describe each of the trees.

A) Capibara and camel share a more recent common ancestor in history than they do with guinea pig. Capibara y camel are more closely related.

B) Guinea pig and Capibara share a more recent common ancestor in history than they do with camel. Capibara y guinea pig are more closely related.

C) The three lineages have the same common ancestor and are equally related to each other.

D) Guinea pig and Camel share a more recent common ancestor in history than they do with capibara. Camel y guinea pig are more closely related.

According to your information, you can determine which tree is the best.

You can learn more about phylogenetic trees at

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