1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lidiya [134]
3 years ago
13

What is the selection pressure for dinosaurs evolving into birds?

Biology
1 answer:
s2008m [1.1K]3 years ago
3 0
In the 1990s, an influx of new dinosaur fossils from China revealed a feathery surprise. Though many of these fossils lacked wings, they had a panoply of plumage, from fuzzy bristles to fully articulated quills. The discovery of these new intermediary species, which filled in the spotty fossil record, triggered a change in how paleontologists conceived of the dinosaur-to-bird transition. Feathers, once thought unique to birds, must have evolved in dinosaurs long before birds developed.
As dinosaurs morphed into birds, they shrank dramatically and adopted a more babylike skull shape.
You might be interested in
Question 1: In Drosophila melanogaster (fruit fly) white eye color (w) and stubby body shape (s) are encoded by two mutant allel
Bingel [31]

Answer:

A female Drosophila of unknown genotype was crossed with a white-eyed male fly, of genotype (w = white eye allele is recessive, w+= red-eye allele is dominant.) Half of the male and half of the female offspring were red-eyed, and half of the male and half of the female offspring were white-eyed.If the trait is dominant, one of the parents must have the trait. Dominant traits will not skip a generation. If the trait is recessive, neither parent is required to have the trait since they can be heterozygous.The female fly had to be heterozygous, Xw+ Xw.

Explanation:

5 0
4 years ago
3 Which of the following is arranged in the
yawa3891 [41]

Answer: A) Atom, Molecule, Cell

Explanation: An atom is the smallest unit of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you. And molecules join together to form cells.

3 0
3 years ago
Read 2 more answers
During an electrochemical reaction, electrons move through the external wire toward the _____ and positive ions in the salt brid
IgorC [24]
Answer : cathode, protocathode

During an electrochemical reaction, electrons move through the external wire toward the cathode and positive ions in the salt bridge move toward the protocathode.
3 0
4 years ago
Which important biochemical process receives a supply of NAD+ ions from the fermentation process during anaerobic respiration?
sammy [17]

Answer:

Glycolysis.

Explanation:

Glycolysis is a universal process that provides energy in the form of ATP molecules. It requires two molecules of NAD+, which are reduced to NADH during glycolysis. Thus, regeneration of NAD+ is necessary as if NAD+ is absent, glycolysis cannot be able to continue.

During anaerobic respiration (respiration in the absence of oxygen), fermentation takes place to regenerate NAD+ used in the process of glycolysis.  

6 0
3 years ago
Read 2 more answers
On Christmas Eve of 1998, the Ohio State Health Department announced that two elderly people had died during the previous six we
cluponka [151]

Answer:See explanation

Explanation:

a. What is the most likely cause of the disease?

The most likely cause of the disease is Listeria monocytogenes.

b. Why is this infection associated with processed meats, but not usually with hamburger or cuts of meat including pork, beef, or chicken?

The Listeria monocytogenes gets into ones body through either food or drink. Under refrigeration, it can survive well and reproduce. In a situation whereby the meats that have been infected isn't properly heated well, then the bacterium will survive. On the other, hamburger or cuts of meat including pork, beef, or chicken are property heated well and therefore kills the bacteria.

6 0
3 years ago
Other questions:
  • Mengapakah pewarna digunakan untuk mengkaji laluan air di dalam struktur xilem ?​
    5·1 answer
  • Explain the differences between the central nervous system and the peripheral nervous system.
    8·1 answer
  • The structures in the mammalian lung that permit gas exchange are the ________
    7·2 answers
  • Is there more energy stored in the producer level or consumer levels?
    14·1 answer
  • What is a fungal spore?
    14·2 answers
  • In which direction in air pressure exerted
    10·2 answers
  • Levene made which contribution to our understanding of DNA structure? a. He determined that the nucleus contains DNA. b. He dete
    5·1 answer
  • Study the graph above. What does this graph suggest about the relationship between human population and extinction rate
    8·2 answers
  • What are we doing to reduce water use
    11·2 answers
  • Describe the joint-associated problems that can occur as normal changes to the articular cartilage as an individual ages.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!