I think your answer is fine. "indicate" is also a possibility. If you have not done so, go to google scholar with keywords "suggest" (or "indicate") and the name of your subject area (e.g. biology). You can find many examples in scientific writing.

suggest, be suggestive of, make suggestion
示唆する
１　It is suggested that—.
　　…が示唆される．
２　It has been suggested that—.
　　…ということが示唆されている．
３　The final figure was 1,000, suggesting that—.
　　最終的な数字は 1,000 であり, これは…ということを示唆している．
４　The suggestion is made that—.
　　…という示唆がなされる．
５　Many authors have suggested this possibility.
　　多くの人がこの可能性を示唆した．
６　Available evidence strongly suggests that—.
　　現在ある根拠からすれば, …ということが示唆される．
７　Various theories have been suggested to explain—.
　　いろいろの学説が…を説明するのに持ち出されている．
８　These findings are highly suggestive of aging process.
　　これらの所見は, 加齢過程を大いに示唆している．
医学英語慣用表現集　第３版文光堂

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Note added at 15 hrs (2010-05-28 02:46:26 GMT)
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http://www.nihs.go.jp/library/eikenhoukoku/2009/015-025.pdf