29. B
30. EXO means your EXporting it out of the cell so the answer would be C
Annual range is the difference of the mean temperature between the hottest and the coldest month.
<span>Cullowhee, NC,
Hottest month:
July - Ave. High: 85 </span>°F ; Ave. Low - 62 °F . Mean = (85+62)/2 = 73.5 °F<span>
Coldest month:
January - Ave. High: 48 </span>°F ; Ave. Low - 24 °F. Mean = (48+24)/2 = 36 °F
Annual Temperature range = 73.5 - 36 = 37.5 °F
<span>
Albuquerque, NM, - </span><span>largest annual temperature range
</span><span>Hottest Month:
July: Ave High: 90 </span>°F ; Ave. Low: 66 °F; Mean = (90 + 66) / 2 = 78 °F<span>
Coldest Month:
December: Ave High: 46 </span>°F ; Ave. Low 26 °F ; Mean = (46 + 26)/2 = 36 °F
Annual Temperature range = 78 - 36 = 42 °F
<span>
Los Angeles, CA - lowest annual temperature range</span>
Hottest Month:
August: Ave High: 79 °F ; Ave. Low: 62 °F ; Mean = (79 + 62) / 2 = 70.5 °F
Coldest Month:
December-March: Ave High: 67 °F ; Ave. Low: 51 °F ; Mean = (67 + 51) / 2= 59 °F
Annual Temperature range = 70.5 - 59 = 11.5 °F
Answer:
Genetic variation is caused by:
mutation
random mating between organisms
random fertilization
crossing over (or recombination) between
chromatids of homologous chromosomes during
meiosis
Answer:
(b)- zone of hypertrophy
Explanation:
Hypertrophic cells synthesize alkaline phosphatase by calcifying the surrounding area; prevent the diffusion of substances, this causes chondrocyte death; therefore, the matrix degrades and the lagoons converge, then the blood vessels proliferate in the collarete to vascularize the cavity. The primitive periodic cells migrate to the vascular borders to become osteoprogenitor cells which are attached to the cartilaginous spicules leaving the degradation of the calcified cartilage, then they become osteoblasts. The combination of cartilage and bone matrix forms a mixed spicule.
Endochondral bone growth begins in the second trimester of fetal life and goes to adulthood, in it there is presence of epiphyseal cartilage.
The epiphyseal cartilage has several areas including:
<u>Hypertrophy zone</u>: it is composed of large chondrocytes that accumulate glycogen. The matrix is compressed between the hypertrophied cartilaginous columns.