Climate regulation, nutrient cycling, and other ecosystem services are economically valuable and essential for life on Earth.
Answer:
Explanation:
Do a plant cell I feel like it was would be easier than an animal cell
1.primary oocytes
<span>- diploid (2 complete sets of chromosomes) </span>
<span>- 'formed' from oogonia during the process of oogenesis </span>
<span>* primordial follicles consist of a primary oocyte + a single layer of squamous follicle cells </span>
<span>* primary follicles consist of a primary oocyte + 1/several layers of cuboidal follicle cells </span>
<span>2. secondary oocytes </span>
<span>- haploid (1 complete set of chromosomes) </span>
<span>- developed from the primary oocyte undergoing meiosis I to form a secondary oocyte + a tiny first polar body </span>
<span>* found in the matured Graafian follicle </span>
<span>* begins meiosis II & stops at metaphase II upon ovulation & only continues upon fertilisation</span>