Answer: the sun heats the earth through radiation
Explanation:
Whale fossil records show large-scale evolutionary changes from their ancestors to their descendants. By inspecting one particular ankle bone, the astragalus, in whale fossil, its shape and structure end a long standing dispute. The whale evolved from artiodactyls and not mesonychids.
A bacteria is an example of a single celled organism, this means they exist as organisms made of only one cell.
The switch from mitosis to meiosis in spermatogenesis is regulated by Follicle-stimulating hormone (FSH) levels of Luteinizing hormone (LH) and this is induced by Glial cell line-derived neurotrophic factor (GDNF).
<h3>How does FSH, LH and GDNF help in spermatogenesis?</h3>
- The development and maintenance of spermatogenesis is dependent on the pituitary gonadotropins; FSH and LH.
- FSH works on Sertoli cells and LH on Leydig cells through their receptors FSHR and LHR respectively.
- Self-renewal and differentiation of the spermatogonial stem cells (SSCs) is regulated by soluble factors produced by the somatic Sertoli cells. One of these is glial cell line–derived neurotrophic factor (GDNF).
Learn more about mitosis and meiosis here:
brainly.com/question/18602191
#SPJ4
You should wear a hat and gloves to prepare for a cold front; the average cold front is about 45-50 degrees, which is cold but not freezing enough for a heavy jacket.
Hope that helps!
