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tatiyna
3 years ago
14

Microbial cells first evolved on earth approximately ________ billion years ago.

Biology
1 answer:
melamori03 [73]3 years ago
7 0
Answer: <span> 3.8 to 3.9 billion years ago


</span>
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Select all that apply. Factors that can increase mutation rates are _____. high temperatures low temperatures food additives UV
saul85 [17]
Answer is High temps. Food additives & UV Rays
7 0
4 years ago
Read 2 more answers
Explain how nephrons deal with plasma protein such as Albumin in afferent arterioles from normal or healthy individuals and pati
devlian [24]

Answer:

Explanation:

The functional unit of the kidney responsible for excretion is the nephron . ... capillaries; Arcuate vein; Arcuate artery; Afferent arteriole; Juxtaglomerular apparatus ... If urine contains albumin or blood cells , it indicates that the glomeruli have been damaged. Binding to plasma proteins will influence urinary excretion .

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3 years ago
List 20 differences between plants and animals​
fgiga [73]

Answer:Growth,Cell wall, Chlorophyll,Photosynthesis, Movements, Absorption of minerals,  Special excretory system ,Centrosome, Lysosome,Vacuoles  Cytokinesis.Animals can move from place to place while plants cannot move as they are rooted to the soil. Plants are autotrophs while animals are heterotrophs.The presence of chloroplasts and chlorophylls in plants while those are absent in animals.plants reproduce via seeds, spores, stems, roots and leaves while animals reproduce sexually by laying eggs or giving birth to young ones.

Explanation:

7 0
3 years ago
Fertilization takes place when a sperm joins a(n)
melamori03 [73]
Q1. The answer is egg.

The fertilisation is a fusion of two gamete cells which results in the formation of the zygote. Sperms and eggs are gamete cells, male and female, respectively. After a sperm and an egg fuse, i.e. the fertilisation takes place, a zygote is created and then begins a development of an embryo.


Q31. The answer is 100% chance

Alleles:
T - the dominant allele for the tongue rolling
t - the recessive allele

Genotypes and phenotypes:
TT - people able to roll tongue 
Tt - people able to roll tongue
tt - people not able to roll tongue

<span>The mother’s genotype is TT and the father’s genotype is TT. The offspring will get T allele from the mother and T allele from the father:
Parents:            TT        x         TT
Offspring:     TT      TT      TT         TT

So, all of the offspring will have genotype TT and will be able to roll their tongues.
 

Q32. The answer is codominant.

A codominance is a pattern of inheritance in which both alleles of a gene are expressed. So, there are no dominant and recessive alleles and both will affect the phenotype. For example, plants with alleles for both red and white flowers will have flowers that are both red and white.</span>
7 0
3 years ago
New nucleotides are attached to the parental strand of DNA in an area called the
jek_recluse [69]
The answer would be A. Double helix

6 0
3 years ago
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