Distinguish between the sex chromosome complements of human female and male germ-line cells at different stages of gametogenesis.

Gametogenesis is the formation of gametes, in males it is referred as spermatogenesis and in females it is called oogenesis.

Explanation:

Differences between spermatogenesis and oogenesis:

1. Spermatogenesis is formation of sperms from spermatogonia and oogenesis is formation of ova from oogonium.

2. Location: Production of sperms occur in testis and production of ova occurs in ovaries.

3. In males, spermatogenesis begins at puberty and its a continuous process till death whereas in females, oogenesis begins at fetal stages, it halts and rest of the process occurs after puberty till menopause.

4. Primary spermatocyte undergoes  meiosis-I to form two secondary spermatocytes, whereas primary oocyte undergoes to M-I to form a single secondary oocyte with a polar body.

5. Meiosis-II results in the formation of 4 spermatids or spermatozoa, in females however M-II results in only one ovum and second polar body formation.

6. Overall we can say that single spermatogonium forms 4 spermatids whereas single oogonium forms only 1 ovum.

7. Sperms are motile where as ovum in non-motile.

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products