1) the process by which pluripotent cells in early embryonic stages become vario

Question

1) the process by which pluripotent cells in early embryonic stages become various cell types is known as ___

A) mitosis

B) meiosis

C) differentiation

D) crossing over

2) Before development of an embryo, sperm and egg had to unite in a process called___.

A) diploidness

B) crossing over

C) fertilization

D) differentiation

3) Which layer is responsible for heart, blood, muscle, and bone?

A) ectoderm

B) mesoderm

C) endoderm

D) basoderm

4) Which country has the greatest prevalence of HIV?

A) United States

B) Botswana

5) how fast a population goes from 200 to 400 individuals is known as the __

A) exponential grow rate

B) logistic growth rate

C) doubling time

D) intrinsic growth rate

6) The different pup fish arose through a type of speciation called__.

A) evolution

B) natural selection

C) mutation

D) allopatric speciation

7) Which fossil is a member of phylum Arthropoda?

A) the T. Rex skull

B) Archaeopteryx

C) Trilobite

D) Saber Toothed tiger

8) Which 2 structures were lost or reduced during the evolution of primates?

A) incisor index and frontal bone

B) Brow ridge and sagittal crest

C) canines and incisors

D) foramen magnum and facial extension

9) what preserved the sabre tooth cat/tiger?

A) volcanic ash

B) tar

C) snow

D) clay

10) who or what travels more miles?

A) you  

B) your sneakers

11) for allopatric speciation you need

A) salinity and temperature

B) different camouflage

C) adaptation and isolation

D) immigration and emigration

Explanation / Answer

1. ANS: C. Differentiation

The process by which pluripotent cells in early embryonic stages become various cell types is known as differentiation.

2. ANS: C. Fertilization

Before development of an embryo, sperm and egg had to unite in a process called fertilization.

3. ANS: B. Mesoderm

The Mesoderm gives rise to connective tissue, cartilage, and bone; striated and smooth muscles; the heart walls, blood and lymph vessels and cells; the kidneys; the gonads4. ANS:

4. ANS: B. Botswana

Botswana has the world’s second largest prevalence rates of HIV/AIDS with 25.16% of the population living with the disease.

5. ANS: A. Exponential growth rate.

When growth becomes more rapid in relation to the growing total number, then it is exponential.

6. ANS: B. Natural selection

Pupfish speciation following geographic isolation took place for this species

7. ANS: ANS: C. Trilobite

Trilobites are swarmed through the ancient sea 500 million years ago. These arthropods (a group that includes modern crabs and lobsters) were known to have eyes. Trilobites are the longest surviving species in history.

Wrong Answers:

A. T. Rex skull is a large skull which present in Tyrannosaurus genus dinosaur.

B. Archaeopteryx is a transitional fossil between non-avian dinosaurs and birds. It is a commonly known as feathered dinosaur.

D. Saber Toothed tiger is a predatory mammal.

8. ANS: C. canines and incisors

Please remind this note: Answering to many questions is against to CHEGG RULE, so I am answering 1- 8 questions.

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