Index fossils are fossils of organisms that ____.

Biology

2 answers:

dusya [7]3 years ago

7 0

Answer:

They were spread over a wide area, and lived over a short period of time

Explanation:

Index fossils are fossils that are used to date back geologically.

Deffense [45]3 years ago

6 0

Answer: Option (1)

Explanation: Index fossils are those fossils which were present only for a short period of time and had wide geographical distribution. This fossils plays an important role in the correlation of rocks i.e two same rocks appearing at two different places, as well as, it helps in the determination of the age of rock. For example, ammonites.

Thus, the correct answer is option (1).

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Damage to what structure may result in a heart murmur?

Sever21 [200]

Answer:

Atrioventricular valves.

Explanation:

Heart is the muscular organ of the body and acts as the pumping organ of the body. Human heart is not bigger than the fist and the human heart is divided into four chambers.

Heart murmur may be defined as the swishing sound that are made during the blood flow. This represent the heart problem. The bicuspid valve of heart is atrioventricular valve. The damage in the atrioventricular valve causes the heart murmuring.

Thus, the answer is atrioventricular valves.

6 0

2 years ago

A pea plant that is homozygous for yellow pods with wrinkled seeds (ggrr) is cross-bred with a pea plant that is heterozygous fo

maria [59]

The correct genotypes of the parents are ggrr for yellow pods with wrinkled seeds and GgRr for heterozygous for green pods with round seeds.
If the heterozygous individuals for both traits express have green pods and round seeds that tells us that these traits are dominant.
In the gross presented below, you can see that the offspring will have 4 different genotypes, all present in an equal percentage:
gGrR 25%
gGrr 25%
ggrR 25%
ggrr 25%