True! Hydrogen bonds hold two stands of DNA together by forming nitrogenous bases. <span>A (adenine) can </span>form hydrogen bonds<span> only with T (thymine)</span>
Answer:
b. prevent the heart from filling properly with blood
Explanation:
The pericardial cavity is the cavity present between the visceral pericardium and the parietal pericardium. It is filled with a fluid called pericardial fluid. In cardiac tamponade, there is an accumulation of excess of the fluid in the pericardial cavity.
The fluid builds up the pressure which in turn compresses the heart. Ventricles of the compressed hearts are not completely filled with blood resulting in reduced cardiac output. Similarly, the return of blood to the heart atria via veins is also reduced in the compressed heart.
<span>The feature of sugar canes that suggests that they are stems is A. t</span><span>he presence of scaly leaves and auxillary buds. Leaves are formed on the stems such that auxiliary buds are also stemming from. Sugar is found in the leaves while roots are another parts from stems</span>
D. Plants have adapted to deal with the sun in many different ways, and this is one. The stomata are regulated by guard cells, which are activated by different things depending on the species of plant, and guard cells are supposed to keep the stomata from staying open all the time and losing too much water to evaporation. So, the solution is to have the stomata on the bottom of the leaf to prevent direct sunlight contact (and therefore more evaporation), and guard cells to protect the stomata.
