D i think..hope it helped if not im sorry lol
Answer:
25%
Explanation:
If they are both heterozygous, it means they both have a Dd genotype. If you draw out a punnet square Dd x Dd you end up with the following possible genotypes for the puppy:
DD, Dd, Dd, dd
In order for the puppy to be deaf, it must be dd since deafness is recessive, which is 1/4 (25%)
Answer:
The correct answer is option - A. 0.
Explanation:
Producers are the organism that produces on their own. They do not depend on other organisms for their nutrition and energy such as green plants. They transfer energy and nutrition.
In the given scenario there is no producer present all are consumers of different levels. Cricket is a primary consumer, a spider is a secondary consumer and bird is the third consumer in this food chain.
Thus, the correct answer is option- A. 0.
Answer:
The radii of the arterioles constrict by humoral control and by nervous control.
Explanation:
The vascular system regulation is performed by the smooth muscle of the arterioles, which constitute the maximum resistance point. The smooth muscle relaxation provokes vasodilation, increasing its diameter. On the contrary, smooth muscle contraction provokes a decrease in the arteriole´s diameter, reducing the blood flow.
This muscle is under the control of the autonomous nervous system and certain hormones.
Substances such as adrenaline, noradrelanine, angiotensine, vasopresin, and endotelines cause vasoconstriction.
Also, there are many vasoconstrictor fibers of the sympathetic nerves that increase resistance and modify blood flow.
Answer:
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Explanation:
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