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
shusha [124]
3 years ago
7

1.some of the fossils that have been found from before the cambrian explosion are embryos this suggests that the organisms these

fossils belong to
a. have bilateral symmetry
b. reproduce asexually
c. exhibit cephalization
d. reproduce sexually
2. most of the body features found in invertebrates evolved during which of the following periods?
a. Jurassic
b. Cambrian
c. cretaceous
d. Permian
3. a marine biologist exploring a deep sea trench locates a new species of soft bodied creatures with an unfamiliar shape. he is able to determine that the creature is a mollusk because it has
a. bilateral symmetry
b. body segmentation
c. an internal shell
d. am internal skeleton
Biology
2 answers:
Helen [10]3 years ago
8 0

It's D,C,C this is the answer

Anvisha [2.4K]3 years ago
8 0

Answer:

1. D. reproduce sexually

2. B. Cambrian

3. A. bilateral symmetry

Explanation:

  • The formation of an embryo (zygote) is a characteristic of sexual reproduction since it occurs as a result of the union of a female gamete with a male gamete.
  • The Cambrian is the period in which most groups of animals appear in the fossil record. The animals that characterize the Cambrian fauna are basically groups of invertebrates such as annelids, arthropods, porifers and echinoderms.
  • Of the described options, the only characteristic of mollusks is bilateral symmetry, since they are not segmented and are soft-bodied animals, ie, they don't have internal skeletons or shells.
You might be interested in
Describe the relationship between organic compounds, nucleotides, RNA, and a universal genetic code.
makkiz [27]

Answer:

Organic compounds→ nucleotides→ RNA→ universal code.

Organic compounds are the compounds made by living organisms with at least one molecule of carbon linked to different elements like hydrogen, oxygen, or nitrogen.for example: nucleotides.

A nucleotide is the monomer units of nucleic acids- DNA and RNA. Each nucleotide is made up of organic compounds- sugar, a phosphate molecule and nitrogenous bases (adenine, guanine, cytosine, thymine and uracil).  

The arrangement of nitrogenous bases in DNA decides the fate of proteins as the sequence of these bases acts as code arranged in the triplet called "codons" which code for specific amino acids.

Thus, Organic compounds→ nucleotides→ RNA→ universal code is the correct answer.

3 0
3 years ago
Jimmy is riding in his car to the office. It is snowing heavily and he can see frost forming on the windowpane. Which type of wa
babymother [125]
This type of water transition or change in phase of matter is known as FREEZING.

Water has molecules that are free flowing and have the ability to collide and bounce against each other, that's why it has that kind of characteristic that it takes the shape of its container.

When these molecules are exposed to lower or colder temperatures, the molecules tend to vibrate and get attracted towards each other, creating a semi-solid or completely solid material. In this example, liquid turned into frost because of the low temperature present within the environment.
7 0
3 years ago
Read 2 more answers
WORD BANK
Keith_Richards [23]
1. Replication
2. Hydrogen
3. Nucleotides
4. Thymine (T)
5. Cytosine (C)
6. Identical
7. Original
8. New
5 0
3 years ago
Read 2 more answers
A hormone released in the small intestine that stimulates the pancreas to release digestive enzymes and the gallbladder to relea
lorasvet [3.4K]

A hormone released in the small intestine that stimulates the pancreas to release digestive enzymes and the gallbladder to release bile is known as Cholecystokinin.

Hormones play a huge position for your normal functioning. They manage heart rate, sleep cycles, sexual feature, and replica. Your metabolism, urge for food, growth and development, temper, strain, and body temperatures are all suffering from hormones.

Cholecystokinin is secreted by using cells of the upper small gut. Its secretion is stimulated by using the advent of hydrochloric acid, amino acids, or fatty acids into the belly or duodenum. Cholecystokinin stimulates the gallbladder to settlement and launch stored bile into the gut. Cholecystokinin (CCK) is produced more often than not inside the duodenum and the jejunum. The physiological roles of CCK are the stimulation of pancreatic secretion and the contraction of the gall-bladder. Secretin and CCK are peptide hormones secreted via the endocrine cells inside the gastrointestinal tract. Secretin stimulates the secretion of water and bicarbonate ions from the pancreas, while CCK stimulates the synthesis and secretion of bile juice and pancreatic enzymes.

Learn more about hormone here:-brainly.com/question/4678959

#SPJ4

6 0
2 years ago
What are the two parts of the nervous system?
svet-max [94.6K]

Answer:

The central nervous system is made up of the brain and spinal cord.

The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

7 0
3 years ago
Read 2 more answers
Other questions:
  • A frameshift mutation that occurs very early in a protein sequence would have what effect on the protein's structure? see sectio
    15·1 answer
  • The secretion of tears, milk, sweat, and saliva are functions of what tissue
    13·1 answer
  • The disappearance of all the members of a species is called ________________.
    14·1 answer
  • What could decrease the passage of oxygen into the blood vessels ?
    7·1 answer
  • Imagine you have engineered a set of genes, each encoding aprotein with a pair of conflicting signal sequences that specifydiffe
    5·1 answer
  • What are amino acids made up of?
    12·2 answers
  • Which type of RNA brings the information in the genetic code from the nucleus to other parts of the cell?
    5·1 answer
  • What organelle directs heredity
    13·1 answer
  • FWhat are components Of RNA​
    8·2 answers
  • Briefly about Endocrine system and it function.​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!