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[科学美国人60秒] 【整理】SSS 2008-02-14

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SSS 2008-02-14

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Barnacles Reach Out To Valentines

Barnacles are stuck to rocks, which presents a challenge for mating. But evolution has endowed them with unique abilities. Cynthia Graber reports.


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【整理】SSS 2008-02-14【整理人】ZPC224
Transcript

This is Scientific American's 60-Second Science .I'm Cynthia Graber. This'll just take a minute.

It's Valentine's Day, even for barnacles which are stuck to rocks. But evolution has endowed these stationary creatures with some curious abilities according to/ research published online in The Proceedings of the Royal Society. Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female. They have other problems though, strong waves in tides. Scientists at Canada's University of Alberta discovered that barnacles cope with this challenge by developing differently shaped genitalia. Barnacles that cling to rocks on wave-exposed shores have shorter, wider organs so they can maintain control in violent waters . Those that are living in coast protected from crushing waves have longer slimer ones. Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice versa. And the animals developed accordingly. For example, barnacles from calm areas that were moved to turbulent seas grew shorter wider members. This experiment shows that barnacles can develop their digit to suit local conditions and reach through churning waters to connect with someone special.

Thanks for the minute for Scientific American's 60-Second Science. I'm Synthia Graber.

============
Vocabulary:
barnacle: marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces
churning: 翻腾的
点!尔何如?鼓瑟希,铿尔,舍瑟而作,对曰:异乎三子者之撰。子曰:何伤乎?亦各言其志也。曰:莫春者,春服既成,冠者五六人,童子六七人,浴乎沂,风乎舞雩,咏而归。夫子喟然叹曰:吾与点也。
Homework

This is Scientific America's Sixty Seconds Science .I'm Cynthia Graber. This'll just take a minute.

It's Valentines Day. Even for barnacles which are stuck to rocks.But evolution has endowed this stationary creatures with some curious abilities according to the research published on line The Proceedings of the Royal Society.

Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female.They have other problems though,strong waves and tides. Scientists at Canada's University of Alberta discovered that barnacles cope this challenge by developing differently shaped genitalia .

Barnacles that cling to rocks on wave-exposed shores have shorter , wider organs so they can maintain control in violent waters . Those are living in the coast protected from crashing waves have longer similar ones.

Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice versa. And the animals developed accordingly. For example, barnacles from common areas that were moved to turbulencies grew shorter wider members .

This experiment showed that barnacles can develop their digit to suit local conditions and reach the churning waters to connect with some one special.


Thanks for the minute. Scientific America's Sixty Seconds Science. I'm Synthia Graber.
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This is Scientific American's Sixty Seconds Science .I'm Cynthia Graber. This'll just take a minute.

It's Valentines Day. Even for barnacles which are stuck to rocks.But evolution has endowed this stationary creatures with some curious abilities according to the research published online in The Proceedings of the Royal Society.

Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female.They have other problems though,strong waves in tides. Scientists at Canada's University of Alberta discovered that barnacles cope this challenge by developing differently shaped genitalia .

Barnacles that cling to rocks on wave-exposed shores have shorter , wider organs so they can maintain control in violent waters . Those are living in the coast protected from crashing waves have longer similar ones.

Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice versa. And the animals developed accordingly. For example, barnacles from calm areas that were moved to turbulent seas grew shorter wider members .

This experiment shows that barnacles can develop their digit to suit local conditions and reach through churning waters to connect with someone special.


Thanks for the minute. Scientific American's Sixty Seconds Science. I'm Synthia Graber.
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This is Scientific American's Sixty Seconds Science .I'm Cynthia Graber. This'll just take a minute.

It's Valentine's Day. Even for barnacles which are stuck to rocks. But evolution has endowed these stationary creatures with some curious abilities according to/ research published online in The Proceedings of the Royal Society.

Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female. They have other problems though, strong waves in tides. Scientists at Canada's University of Alberta discovered that barnacles cope with this challenge by developing differently shaped genitalia.

Barnacles that cling to rocks on wave-exposed shores have shorter, wider organs so they can maintain control in violent waters . Those that are living in the coast protected from crashing waves have longer similar ones.

Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice versa. And the animals developed accordingly. For example, barnacles from calm areas that were moved to turbulent seas grew shorter wider members.

This experiment shows that barnacles can develop their digit to suit local conditions and reach through churning waters to connect with someone special.


Thanks for the minute. Scientific American's Sixty Seconds Science. I'm Synthia Graber.
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This is Scientific American's 60-Second Science .I'm Cynthia Graber. This'll just take a minute.

It's Valentine's Day, even for barnacles which are stuck to rocks. But evolution has endowed these stationary creatures with some curious abilities according to/ research published online in The Proceedings of the Royal Society. Male barnacles have members that can stretch to eight times their body length to reach a similarly stuck female. They have other problems though, strong waves in tides. Scientists at Canada's University of Alberta discovered that barnacles cope with this challenge by developing differently shaped genitalia. Barnacles that cling to rocks on wave-exposed shores have shorter, wider organs so they can maintain control in violent waters . Those that / living in / coast protected from crushing waves have longer slimer ones. Researchers transplanted young barnacles living in protected coasts to unprotected ones and vice versa. And the animals developed accordingly. For example, barnacles from calm areas that were moved to turbulent seas grew shorter wider members. This experiment shows that barnacles can develop their digit to suit local conditions and reach through churning waters to connect with someone special.

Thanks for the minute for Scientific American's 60-Second Science. I'm Synthia Graber.

============
Vocabulary:
barnacle: marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces

churning: 翻腾的
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