Answer:
semi-permeable
Explanation:
passive transport is the movement of substances along the concentration gradient and no energy is utilized in it
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hope this helps!
Answer:
Answer is option A.
Orchid bees are to Brazil nut trees as breezes are to pine trees.
Explanation:
In Brazil nut trees, the female orchid bees act as pollinators that help in pollination. In pine trees, wind or breeze helps in pollination.
Pine trees are gymnosperms and so they do not have flowers to attract pollinators like bees or butterflies or birds. They are wind-pollinated. Pine trees are monoecious i.e., both male and female reproductive structures (pine cones) are present on the same tree.
The male cones (catkins) produce pollen grains that are lightweight, less sticky and have air bladders or small wing-like structures. As a result of these features, the pollen grains can be easily carried and dispersed by the breeze. In order to prevent self pollination (pollen falling on the female cones of the same tree), the male cones are normally located on the lower branches of the pine tree.
The female cones are located on the upper branches of the tree and the center of the cone contains eggs or ovules. The pollen grains that are carried by the wind, fall on the female cone of another pine tree. Each pollen grain grows a pollen tube into the center of the cone and the nucleus cell of the pollen travels through the tube and reaches the egg, where it combines with the egg to form an embryo. The embryo eventually grows into a seed. The seeds of pine trees are then dispersed by wind or animals such as squirrels.
Coronary arteries are the arteries that branch off the ascending aorta to supply the heart with oxygenated blood. The heart muscle which similar to each further organ or tissue in your body is essential of oxygen-rich blood to stay alive. Blood is delivered to the heart by its own vascular system which is called coronary circulation. The aorta the main blood supplier to the body branches off into two core coronary blood vessels also named arteries. The right coronary artery deliveries blood primarily to the right side of the heart. The right side of the heart is minor because it drives blood only to the lungs and the left coronary artery which outlets into the left anterior down artery and the circumflex artery deliveries blood to the left side of the heart. The left side of the heart is bigger and more well-developed since it drives blood to the rest of the body.
Epididymis would be the correct answer, can i get brainliest please
