Explanation

On a DNA strand, nucleotides are linked together by phosphodiester bonds.

These bonds connect the 5' carbon of one nucleotide's sugar to the 3' carbon of the next nucleotide's sugar, forming a chain. 

Explanation

Meiosis II is the second division in the process of meiosis, which reduces the number of chromosomes in a cell by half.

If a cell starts with 42 chromosomes in telophase II, then each daughter cell will have 21 chromosomes

Because meiosis II divides the chromosomes into four haploid cells. 

Explanation

 If both parents have AB blood groups (genotype IAIB), their offspring can have blood types A, B, or AB, but not O.

This is because blood group O requires two recessive "i" alleles, which are not present in either parent's genotype. 

Explanation

Genetic drift is the random fluctuation of allele frequencies in a population.

They are often due to chance events or sampling errors.

It can lead to the loss of alleles, especially in small populations, or the increase in frequency of rare alleles.

The effect of genetic drift is more pronounced in smaller populations

Random events can have a greater impact on allele frequencies. 

Explanation

 An anticodon is located on tRNA (transfer RNA).

The anticodon is a sequence of three nucleotides that recognizes and binds to a specific codon on mRNA during protein synthesis. 

Explanation

A palindromic sequence reads the same forwards and backwards.

Given the sequence "CTTAAG", the complementary palindromic sequence is "GAATTC". 

In DNA, A pairs with T and C pairs with G. 

When reading the complementary strand from 5' to 3', the sequence becomes "GAATTC", which is the same as the original sequence read from 5' to 3'. 

Explanation

The roundworm, also known as a nematode, is an invertebrate that possesses a pseudocoelom. 

Explanation

The invertebrate that has a water vascular system is an echinoderm

Specifically starfish, sea urchins, sea cucumbers, brittle stars, and feather stars.

This unique system is a defining characteristic of the phylum Echinodermata. 

Explanation

 Structures that have similar functions but evolved independently from different ancestral origins are called analogous structures. 

Explanation

The smallest unit that can evolve is a population. 

Evolution refers to changes in the allele frequencies within a population over time

Since individual organisms cannot evolve on their own,

it's the group of individuals (the population) that experiences these changes.