During recombination

1)sister chromatids undergo crossing-over with each other.
2)chiasmata hold chromosomes together.
3)one crossover event occurs for each pair of human chromosomes.
4)the synaptonemal complex keeps the sister chromatids together until anaphase ii.

2)chiasmata hold chromosomes together.

Explanation:

Chiasma (pl. Chiasmata): it is the point of contact, the physical union between two non-sister chromatids that belong to homologous chromosomes. In a given chiasma, an exchange of genetic material can occur between both chromatids.

1) is FALSE becasue recombination occurs between chromatids of homologous chromosomes, NOT between sister chromatids.

3) is FALSE because more than one recombination event can occur in a given pair of homologous chromosomes.

4) is FALSE becasue synaptonemal complex keeps homologous chromosomes together, NOT sister chromatids. Additionally, recombination occurs in prophase 1, long before anaphase 2.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?