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What subphylum, which includes crabs and crayfish, represents the dominant aquatic arthropods?

asked Jan 7 in Science by CecilaDavey7 (490 points)

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What subject is a way of learning about the natural world that is based on evidence and logic?

asked Jan 7 in Science by DianeHarney1 (590 points)

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What structures sweep laterally, hugging the pelvic walls, then turn medially and pierce the bladder wall obliquely?

asked Jan 7 in Science by AnjaAlbino53 (330 points)

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What structures receive blood from the atria and pump it out of the heart?

asked Jan 7 in Science by StevenSparks (450 points)

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What structures of the cardiovascular system help regulate body processes by either constricting or dilating?

asked Jan 7 in Science by Erik71620607 (510 points)

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What structures include the vagina, uterus, ovaries, and fallopian tubes?

asked Jan 7 in Science by HJREarl88961 (430 points)

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What structures formed of twisted actin chains are found in almost every cell, and are numerous in muscle cells and cells that move by changing shape?

asked Jan 7 in Science by BradleySkt2 (270 points)

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What structures are located on roof of the nasopharynx and on each side of the pharynx?

asked Jan 7 in Science by ChristineMac (430 points)

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What structure, containing many internal membranes, is the site of photosynthesis?

asked Jan 7 in Science by DanieleBryso (270 points)

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What structure supports the body, protects internal organs, produces blood cells, and maintains mineral homeostasis?

asked Jan 7 in Science by KaceyDixon06 (370 points)

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What structure shows the bonding between atoms, with dots representing available electrons?

asked Jan 7 in Science by ErnestineMac (270 points)

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What structure passes oxygen and nutrients to a growing fetus in mammals?

asked Jan 7 in Science by PaulinaEsteb (330 points)

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What structure of the heart receives oxygen-poor blood from the body, then pumps the blood into the right ventricle?

asked Jan 7 in Science by VYJGarnet136 (330 points)

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What structure of the body falls between cells and organs in complexity?

asked Jan 7 in Science by GregoryFrank (450 points)

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What structure of a cell is enclosed by a membrane and contains most of the cell’s dna?

asked Jan 7 in Science by AsaRomo82357 (430 points)

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What structure is the site of all of the basic biochemical processes that keep organisms alive?

asked Jan 7 in Science by GonzaloBecer (530 points)

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1 answer 53 views

What structure is made from dna and protein molecules coiled together?

asked Jan 7 in Science by WOTAretha195 (390 points)

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What structure is found at the top of the head of the sperm that helps it penetrate and fertilize the egg?

asked Jan 7 in Science by ENCIsabel625 (630 points)

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What structure is an organelle that contains enzymes that break down and digest unneeded cellular components?

asked Jan 7 in Science by DaniPflaum9 (630 points)

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What structure is a larger assembly of several polypeptide chains that are now referred to as subunits of the protein?

asked Jan 7 in Science by KathaleenBea (570 points)

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