Document page
biology 0610printed 34 · PDF 34
328 pagesrevision 46933
printed 34 · PDF 34
Page image rendered from the stored file at 110 dpi; it sharpens as you zoom. Outlines are placed from each region’s stored position on the page (612 × 792 pt).
no text layerread by OCR (tesseract5-eng@250dpi)The text layer was unusable, so the page image was read by OCR. OCR text can contain misread characters.
Source of this text: read by OCR. The better of the embedded text and OCR is kept.
Fig. 3.1 shows images of red blood cells from a human, A, and a bird, B.
nucleus
Fig. 3.1
(b) There is a nucleus present in each of the red blood cells of the bird, as shown in Fig. 3.1.
(i) State the function of a nucleus.
ssaavvesaesienyssyeusausyssunesncssiencunenasreusussrenisusstessenecseuseassaeseransseesussuneseseaynaresrsreuseeaseuaseoneTesstes [1]
(ii) Human red blood cells do not contain a nucleus.
State an advantage of this.
More space for haemoglobin. and more...
efficient oxygen carrying ability
SS aa Th ac RS Tas itn aU EAA ST as Bs ANT Te oa Cae TENT CConda Sel TS STATO Ne SAT oad Ge Tansee [1]
34