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Ymorist [56]
2 years ago
15

Tetrapods (amphibians, reptiles, and mammals) all share a common ancestor. Which of these traits was NOT present in the common a

ncestor of all tetrapods (amphibians, reptiles, and mammals):
a. Amniotic egg
b. Vertebral column
c. Digits
d. Paired appendages
e, Jaws
Biology
1 answer:
zloy xaker [14]2 years ago
5 0

Answer:

Amniotic egg.

Explanation:

Amniotic egg is the advanced evolutionary character first appeared in reptiles. These amniotic egg allows the reptiles to colonize on the dry lands. This amniotic egg is covered by hard shell in birds and reptiles.

The amniotic egg is not present in fishes and frogs as they lay their eggs in water. The amniotic egg is present in reptiles, birds and mammals. The vertebral column, paired appendages, jaws and digits are present in frogs, reptiles, birds and mammals.

Thus, the correct answer is option (a).

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(Q005) Humans are unusual because our cultural practices can actually change our environmental circumstances. We can change the
mel-nik [20]

Answer:

sickle cell disease or sickle cell disease is about the inheritance of metaplastic cells or cells that do not respect normal cell morphology from the mother or father to a child.

This is not associated with cultures, instead lactose tolerance is.

Explanation:

Lactose tolerance is basically an adaptation of the body in those humans who continue to drink milk throughout their lives, once the growth stage is over, milk should be suspended, although some continue to consume it and lactase continues to be encoded and expressed.

Some people for cultural reasons or environmentalist lifestyles do not drink animal milk, but rather vegetable milk.

7 0
2 years ago
Match the following vocabulary words. 1.ciliary musclesA transparent liquid which is located between the cornea and iris. 2.opti
klio [65]

Answer:

1. Aqueous humor.

2. Ciliary muscles.

3. Cone.

4. Cornea.

5. Iris.

6. Optic nerve.

7. Photoreceptor.

8. Retina.

9. Rod.

10. Sclera.

11. Vitreous humor.

Explanation:

A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.

Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.

An eye can be defined as a specialized organ of sight with the capability to receive visual images that are subsequently transduced into neural signals and relayed to the brain for processing and interpretation. Some of the components of the human eye matched with their description are;

1. Aqueous humor: a transparent liquid which is located between the cornea and iris.

2. Ciliary muscles: muscles attached to the lens to change its shape.

3. Cone: a photoreceptor cell which functions best in bright light. It detects color.

4. Cornea: the transparent portion of the sclera at the front of the eye.

5. Iris: a special part of the choroid layer composed of colorful tissue.

6. Optic nerve: the nerve connecting the eye to the brain.

7. Photoreceptor: specialized cells located in the retina that receive light images.

8. Retina: a delicate light-sensitive membrane covering the inside of the eyeball.

9. Rod: a photoreceptor cell which is sensitive to dim light, but detects no color.

10. Sclera: a fibrous material surrounding the eye to give it shape.

11. Vitreous humor: a transparent jellylike substance filling the eyeball.

8 0
1 year ago
Read 2 more answers
The NET reproduction per individual per unit time (r) is _____ per mouse per month in a population of 1,000 mice where 500 mice
Phantasy [73]

Answer:

0.1

Explanation:

The Net Reproduction per individual per unit time (r) can be calculated as (births-deaths)/population size

Given that:

Population size of mice = 1,000; Birth = 500; Death = 400,

Net reproduction rate (r) = (births-deaths)/population size

r = (500 – 400)/1000

r = 100/1000

r = 0.1

The Net reproduction per individual per unit time (r) is 0.1

3 0
2 years ago
Describe the function of each organelle. Nucleus Ribosome Endoplasmic reticulum Golgi apparatus
Fofino [41]
Nucleus controls the cell, it tells the cell what to do, similar to a brain. Rough ER or Ribosome ER creates the proteins in the cell. Golgi Apparatus packages macromolecules like lipids and proteins for transport.
7 0
1 year ago
Read 2 more answers
A purple flower with an unknown genotype is crossed with a white flower. Determine the genotype of the purple flower if purple (
Furkat [3]
If purple is dominant, the genotype of the purple flower could be PP or Pp, as both would give a purple colour. However, if the crossed flower turned out to be white, we could say with certainty that the genotype of the purple flower is Pp as the genotype of the white crossed flower would be pp, which would not be possible if the purple flower's genotype was PP.
5 0
2 years ago
Read 2 more answers
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