3 years ago

What is the best description of organisms of the Precambrian era?

Biology

1 answer:

7nadin3 [17]3 years ago

4 0

Sinlge-celled organisms and soft, boneless animals. Back then organisms were single-celled and simple.

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All of these ___ help to block, trap or flush pathogens out of the body.

Licemer1 [7]

Answer:

natural barriers

Explanation:

skin, mucous membrane, tears, earwax, muscus, stomach acid

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3 years ago

Anyone wanna help me out with these questions word box at the top.

MA_775_DIABLO [31]

Answer:

1) phenotype

3) punnette square

4) pedigree

5) sickle cell anemia

6) hemophilia

7) cystic fibrosis

8) albinism

9) muscular dystrophy

10) chromosomes

11) heterozygous

12) co-dominant

13) sex linked

14) heredity

15) dominant

16) recessive

17) Gregor Mendel

18) genetics

Explanation:

Hope this helps :)

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3 years ago

Anemia is caused by a defective gene resulting in abnormal hemoglobin: a. Hemorrhagic anemia b. Aplastic Anemia c. Pernicous Ane

OverLord2011 [107]

Answer:

it's sickle cell anaemia the answer it's D

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3 years ago

Name two types of evidence some scientists used to support

Fudgin [204]

If you are talking about evolution, the two types of evidence is
1. fossil evidence
2. molecular evidence

6 0

3 years ago

Read 2 more answers

"Scientists will often grow bacteria in prepared petri dishes. In some experiments, the petri dish will also contain paper disks

astra-53 [7]

Since I can't physically insert the appropriate heading, with units, I'll make the data table below by using the information given.

Disk-----------Measurement of ZOI (mm) also acceptable is ZOI (mm)

A--------------13 ( +/- 2 mm)

B--------------8

C-------------0

D-------------9

4 0

3 years ago