Answer:
Cheek cells are eukaryotic cells
Answer:
Phospholipids are able to form cell membranes because the phosphate group head is hydrophilic (water-loving) while the fatty acid tails are hydrophobic (water-hating). They automatically arrange themselves in a certain pattern in water because of these properties, and form cell membranes.
Explanation:
Crossing over? That involves the random exchange of chromosomes.
<h2>540 million years ago
</h2>
Paleozoic.
Era immediately follows Precambrian It lasted about 4.5 billion years.
When did abundant fossil evidence first appear in the geologic record.
540 million years ago.
<h2 /><h2><em><u>Collenchyma</u></em><em><u>.</u></em></h2>
<em><u>Explaination</u></em>
<em><u>Collenchyma is the tissue found below the epidermis of a leaf stalk. These are simple permanent tissue, perform photosynthesis when chloroplast is present</u></em><em><u>.</u></em>